I have the giant multiple puzzles book that I pick up cheap at “Ollie’s” which is a discount store. Word search, crosswords, and on my cell phone I have free solitaire games and free bubble pop - where you have to figure the ‘angles’ to shot at the bubbles so that you win the game. When I get tired of this, I draw out quilt blocks and choose color options with my colored pencils. I think I will get the hand-held electric scribe and a bag of polished black rocks and start drawing on them. Example: Alaskan designs, American Indian design, designs from the era of the Druids, Gothic, Dragons, forest animals…etc. Any of these will help your brain.
So far, when I forget, I usually remember within four or five minutes.