Title pretty much sums it up. I remember a thread like this from the 1up forums before they started kinda sucking. Basically you just post what games you've played/are playing/are going to play today.
I'll start it off.
Today I played Rock Band 2 and beat my old high score onGH&HT by over 40k. I'm going to play Ninja Gaiden 2 in a little bit because I want to beat it and I'm close to the end. Lastly I'll probably sneak in some Sims 3, because it's too addiciting not to.