Cognitive Therapy helped me a Lot.
Once a week for 6 months at Tampa General Hospital. The tests surprised me and found my weak spots I was not aware of. The therapist was actually a speech therapist and reading the tests out of a book and she told me of work a rounds to my problems that worked. The easy one was carrying a small note book and pen to write things down. Phoning my answering machine and leaving myself a message. Sticky notes. A pocket recorder.
Things are much better than shortly after the accident when I would be driving somewhere and had to pull over and think hard of where I was supposed to be going. The notebook worked. I used it a lot the first year. I had a jacket made with many pockets and a place for everything. It was like a check list to be sure I had my phone and wallet and book and meds etc with me at all times.
Ask your Doctor or Hospital if they have Cognitive Rehab. Check out this book on Amazon Brain Injury: A Home Based Cognitive Rehabilitation Program