Creative writing/poetry, listening to many genres of music, crossword puzzles, scrabble, luminosity and talking to as many people as I can ...all help with cognitive issues

Listening to music helps me when the brain fog rolls in. Depends on the day, but I listen to anything I can sing along with. Don't know if it is just relaxing the muscles or changing the focus to a different part of my brain that does the trick...but it seems to help clear the fog.

I use www.lumosity.com to stay sharp.

Good idea @MarlaDLansi. Music can enhance memory and concentration.

I agree with Nansi - all of those things she mentioned are great helps. Add to that Word Search (come in small paperbacks) as there really help you focus!