Dyslexia in Managers - coping strategies

 I'm not dyslexic, but know a little because my daughter has recently been diagnosed as dyslexic. Dyslexia is a very variable condition - so that things which work for one person don't work so well for another. I think you'll have to try things, keep the things that work, and keep on trying.
I hope you will find that the full dyslexia assessment is both useful and empowering. It may point you towards particular things you find difficult, and so help suggest solutions. It also gives you re-assurance that you are dyslexic rather than stupid or lazy (that sadly common mistake), and gives both you and the people you deal with a better understanding of why things are as they are.
You don't say where you are geographically. In the UK, dyslexia qualifies legally as a disability, and that puts your employer under some obligations to take reasonable steps to help you, if you discover you  are dyslexic and then decide to inform your employer. The British Dyslexia Association has good stuff on their website http://www.bdadyslexia.org.uk/about-dyslexia/adults-and-business/dyslexia-support-in-the-workplace.html (If you are not in the UK, perhaps you can find similar sites covering the law in your country). The British Dyslexia Association (or its equivalent in your country) could be very useful to you - advice, publications, opportunities to meet other dyslexics & share tips
I have a few suggestions that might help (but remember that you need to find your individual "prescription" - don't give up if these don't work; at least, I think my suggestions are unlikely to be harmful!):
Some dyslexics find that its easier to read through a coloured filter (try putting a piece of paper in some of those coloured transparent plastic folders. Try different colours. See if it helps to read through the coloured folder. 
Try using Mind Maps ( http://en.wikipedia.org/wiki/Mind_map ) rather than text notes to take notes or organize your thoughts
You mention problems that sound like you get easily swamped by trying to keep a lot of steps in your head at once (a common problem for dyslexics). Instead of a to-do list, maybe you should try a kanban board. (here's a video http://www.infoq.com/presentations/personal-kanban )
But, At its simplest, each time you need to remember to do something, write it on a small card (or post-it note). Have somewhere, e.g. a pinboard,  you can keep these notes arranged. Have an area for things you are doing now, and an area for things you will do later. You can move the notes around the board to act as a visual reminder of what you are doing now and next. The visual-ness of it, and the physical act of moving the notes around might help you. It also helps you to remember not to try to do too many things at once (e.g. you make a rule that you can only allow a certain number of things into your "doing now" section" - if you're given a more urgent task, return something else to the "to do" portion. One of kanban's key principles is not to have too much work in progess, so kanban products tend to support  a dyslexic's need not to overload his or her short-term memory. If kanban work for you, you might consider getting your directs to use it too - a big kanban board in the office for the team's tasks might be helpful for everyone, dyslexic or not..
If it's not convenient to have a notice board there are various software products that let you make a virtual kanban board (its a fashionable method of organizing software projects, an idea copied from manufacturing).
For your personal use, you can make a small portable  kanban board from one of those folders that are meant to hold business cards (e.g.a product like  his http://www.euroffice.co.uk/i/xsh/Goldline-Classic-Business-Card-Holder-PVC-64-Pockets-for-128-Cards-280x110mm-Black-Ref-CBC4PZ ) You would  write each task on a business-card-sized card and move it between slots (At last, a use for the old business cards everyone is left with when job titles or company logo changes!).. You have one page for stuff you're doing now  other pages for things you need to remember to do later, and possibly some slots for things you've finished . 
A warning - be a bit careful about using sticky notes (e.g. Post-it notes) for a kanban system if you just use their own glue to stick them on. The treacherous little things tend to fall off or blow away, and there goes your best chance of remembering to do whatever it was.
More generally, look for opportunities to represent  things  physically where you can  - seeing things arranged in space or moving them about may help you keep track of things in your head.  
My dyslexic daughter finds it very helpful to think things through out loud, talking to herself  to support what she's thinking about. Maybe that will be helpful for you. 
Digital recorders might help - as a way of recording your thoughts at the speed you think them; or recording meetings etc as a backup if you find it more difficult than most to attend to a meeting and take notes. My daughter has recently been trying an ipad app called supernote https://itunes.apple.com/app/id484001731?mt=8 Demo version is free, full version is cheap. Early days, but it looks like it might help. There are many rival products, which might be as good or better. Do tell people that you are recording them though, and ask if that's OK (tell them why if you can): otherwise it can look like you're bugging meetings for some devious purpose.
Teleconferences using software (GoToMeeting and its competitors) can often be recorded (sound and on-screen events) . 
If you are the manager, you can get your directs to take meeting notes. This is good training for them, not weakness on your part. You will be eager for them to take, concise, organized notes, rather than lots of waffle. You'd want that whether or not you are dyslexic - as Winston Churchill (a dyslexic) noted, long memos waste both the time of the person writing them and the time of the person reading them. That is also good training for them (there are good podcasts on this site about meeting notes). Notes should focus on "who does what by when" (and occasionally "why did we decide to do this" or "why did we decide not to do this"). It is good for your directs to be made to learn this :)
Voice recognition software seems almost usable now - an iPhone 4 or 5 can often record a diary appointment or to-do by voice command (the Siri feature), and my daughter can often dictate things to Notes on the iPad. These systems make mistakes, but it can help to get the gist down and then to correct later. Obviously if you are struggling to write important copy then you should get someone to check it for you. But surely that is just good practice - ALL important copy should be checked by as many different people as practical, to eliminate mistakes. Even for Hemmingway "The first draft of something is always S**t".
You've already discovered the podcasts here - its great that so much stuff on now available as podcasts and video: worth looking for these optionsinstead of printed materials when that's an option. 
 Hope that helps
 
Noted dyslexics in business include  Thomas Edison, Richard Branson and Bill Gates. And many more very admired pepole: http://www.bdadyslexia.org.uk/about-dyslexia/famous-dyslexics.html  
 So nobody can argue that dyslexics can't succeed in the business world!
 
 Good luck to you.

 Regraham,
I am not dyslexic either, but I just wanted to share with you that you are not alone in your struggle.  I was out of work for 6 months too as I had a nervous breakdown at work a couple of years ago now.  My problem was I was comparing the amount of work I could get done before I had kids with the amount of work I was doing coping with also raising two kids.  I just couldn´t find myself productive enough.  Neither at work, neither a good enough mother.  
The way I sort it out was to rather than focus on how good I could be, focus on what I wanted to be.  And I found out the reason for my breakdown and the depression that followed was I wasn´t doing what I wanted to be doing.  I changed my life completely after that, and today.  Although I wouldn´t go through it again if I could go back, I am thankful I had a breakdown because I don´t think I would have changed otherwise.  It was a blessing in desguise. I hope you will eventually see your time off the same way!
I did theraphy as well.  And it did help.  But what helped most was I started doing meditation.  If you have recurring thoughts you want to get rid off (like not being good enough, or not doing enough), or your mind just wanders away from what your body is doing, the only way out I know is to learn to control your mind and learn to keep your mind with the same action your body is committed to.  This is what you achieve through meditation.  You can joing a group or you can start by yourself.  Just whenever you have your mind wandering where you don´t want it to be, focus on the activity you are doing at the moment.  You can also give it a try of the following technique:  http://youtu.be/-cpHQScEvB8
All the best to you and I hope you recover!  And I am sure you are just as good a manager as any of your peers!  Everybody has their own pitfalls, theirs are just perhaps different than yours.  So there is no point comparing!  Because you don´t see their faults.  Just like they don´t see yours the way you do.
Nara