I've been hand loading for about 5 or 6 years now - when I fist started I logged everything, heck even took a scientific approach to working up loads using the ladder method, numbering each cartridge, etc. I really enjoy reloading and at times I think I must just get into a zone or something and forget simple things like logging my progress. Regarding age... well, I'm half way between 50-60 so senility may be creeping it's way in.
Blessings
Paul