Sadly, if I don't pre-order, I forget when games come out (it comes with age...): so I immediately pre-order any game I'm interested in. Currently I have the following pre-ordered:
Gears 3, Uncharted 3, Skyrim and Mass Effect 3.
Will probably put down money on Rage and Warhammer: Space Marine.
MW3 and Battlefields are maybes for me, right now.