Yes, I keep a record of every wager. I break it down into seasons. Like 09' baseball wagers, 2010 baseball wagers, 09-10' Basketball wagers and so forth. I find I learn quite a bit by doing this. It often brings to the surface flaws in my betting style. Like betting too many road teams, too many favs, too many road favorites and so on. It's one of my most valuable tool when capping games.