I can't tell you the number of impulse buys I've made on Steam. Their weekend deals are typically very tempting and their holiday sales...well let's just say I spent more than I expected during Halloween. This weekend they have the Codemasters Racing Bundle
. It includes Dirt 3
and F1 2011
, and with a 66% discount you get both games for $33.99. Not a bad deal if you're into realistic racing sims.