LADIES ~ as a social/community support worker, I worked with many people (young persons & adults too) who had varying degrees of ADD (my DH has this too), and we found that using schedules, calendars, and journaling helped them immensely -- it actually brought order to their lives so that they could function and achieve much more.
We found that putting a large calendar on the wall and marking each thing they wanted to do was the most helpful tool of all. We put down everything from brushing their teeth to appointments and even marking mealtimes, chores, plus recreational & social activities ... well everything really ...
Heck, I now find this helpful for my DH and I as we get older as our short-term memory isn't as good as it used to be; and my DH really needs this as he has a severe memory problem (always has). You could mark down what you plan to eat and regular small amounts of exercise like going for a 10 minute walk each morning; and then strike things off as you do them (my DH really loves to do that each day).
Hope this idea helps you a bit ... Rosebud