I have the same problem, so here's what I'm doing: I look at my Badge List, see which games I didn't play that still have Card Drops, and I start playing them. It's usually one card every 40 minutes, so, depending on how many cards you have to drop, that's like 2-4 hours per game.
I found some real stinkers (oh god Guncraft and Nuclear Dawn) and some Forgotten Gems (Fortix 2!) that way.
I mean, I even loved Arkham City, and Asylum is just sitting there being neglected
On my behalf, I have started Deus Ex: Human Revolution, just gotta play it for another 4 hours or so to make sure the hooks sink deep enough to make me finish this gem.