How About A pocket Tape Recorder?
Alright, I know they are not tape recorders any more but I have carried a recorder in the outside pocket of my tank bag forever. I do a lot of writing and if I don't get a thought or the sketches to a story down on some retrievable method it might as well be written on the wind. I know from past experience I will forget part of it. The important part. Someone gives you directions to a great restaurant off the beaten path, record it's location. I get the idea for a new story or a revision of one I am writing, I have it on.... micro chip? Directions to a scenic view or free camping place, it's on tape. They are small and cheap.