I just started a list the other day, and it was scary to see how many things I still need to scrap. But good in a way because I know I'll never run out of things. One of my scrapping buddies keeps a list in Excel. She has it numbered and then when she wants to scrap, she'll randomly pick a number and scrap whatever it was. I totally like that idea, but don't know if I could do it. I might just have to give it a try.
I also have little scraps of paper stuck in spots where I've jotted things down that are specific things someone said so I can remember them.
Paper Coterie has a new journal line that is sort of for the P365/Project Life idea, but it gives you a spot every day to write down what happened that day. Kind of like the old-school version of Oh Life. I might just get it to keep handy to use for scrapping ideas.