I've been keeping a food diary since Nov 2014. It started off as a reminder to myself to eat better and fewer calories. I don't want to break the chain I even recorded my meals during over a week of no power after hurricane Fiona.
Here's my supper on day 1 if anyone is curious lol (note format is: day, month, year)
Saturday 01/11/2014 Beans, Baked, molasses and pork
Saturday 01/11/2014 Rice, Basmati, 1 cup
Saturday 01/11/2014 Pop, Orange cream, 355ml
Also my exercise inadvertently became a memory tool for me as well. Since being diagnosed with hypothyroid I noticed that my short-memory was not great. So this is a way to force myself to remember things I did today. Stuff I'd normally dismiss as unneeded info and clear it from my mind.