I think that's every Steam users' problem! Even with my crappy laptop which doesn't play newish games the Steam library grows and grows. Those bundles are to blame, don't you think?
Well, I was hoping to meet some guys of Fuwa over at Backloggery to add some more ppl to my Multitap. I enjoy updating my Backlog there. If anyone wants to check my (relatively small) collection out, here you go!
Feel free to leave a comment.
Edit:
I think many people don't know The Backloggery. The only "problem" there is, that you have to type in your games manually since they don't have a list of videogames of any sort. That leaves the user a bit more freedom in cataloguing his games imo, but sometimes I wished they had a feature like that.