I frequently work at crossword puzzles, soduku, cryptographic puzzles. Any puzzle pretty much. Somedays I do OK and others not so much. The nueropsych I saw gave me the recommendation to use a day runner with a week at a glance view with a smart phone to augment my memory deficit.

I also use a note pad and write in it frequently things I want to remember. I use the timer function in my phone to prompt me to look at the notebook. Its not as tedious as it sounds once you are in the habit.