Methods to help memory distortion/loss/problems?

Memory issues hit me the most when it comes to DP/DR, in my opinion. The most I can remember clearly is from before it started, but that was around the time when I was a kid so it isn't that reliable.

I was wondering if anyone found any tips or tricks to help this out? I was gonna consider buying posted notes and scribbling things on them I needed to remember (think the movie 'Memento').