Routine and consistency can be very helpful with distractibility and poor memory. Visual and time cues are helpful as well.

So, if you can establish and keep basically the same daily routine or at least keep some basic events from day to day approximately the same, it can help.
Get up approximately the same time, teeth, shower, eat, coffee, etc in the same order.

Try to do laundry or chores around the same time, get the mail around the same time, appointments for specific doctors or therapy on the same days.

Have a hook for your keys, a box or basket by the door for your wallet, purse, gloves, bus pass, etc. always put those things there. If you walk past it and into the house, turn around and go back to the assigned place and put the things where they belong.

Get a desk calendar, set daily alarms for medications, sign up for google calendars.

Google calendars I have found pretty invaluable. You can choose to integrate it into your desktop or not, and there are ipod, iPhone and iPad apps as well as the google/gmail app. (If you don't have a gmail account you could make one for google calendar and have any alerts forwarded to your main email) it's a great program because you can pretty much set up any number of alerts any time ahead of whatever appointment or task. Some things I have two SMS messages, twelve hours before and two hours before and then an email thirty six and twenty four hours before. And then you can also choose to have a daily agenda sent to you.

Annnywho...
Get three of those little pocket memo notebooks. Put one by the computer, one by the phone or on the kitchen counter and one in your pocket or purse- keep a small pen in the spiral binding.

Get a whiteboard and several colors of dry erase ( the colors may help to differentiate when you try to remember)

Ok. I'm out of tips and tricks haha.

Wait one more!

Important things for the next morning: post it note in bright ink on the bathroom mirror.
You will likely look at it repeatedly while brushing your teeth.