We all have one (or two or three). The pile of books to be read. I can currently admit to having over 90 books that I plan on getting to one day. I even have the next 45 or so mapped out in the order I'll supposedly read them. Things change though, most often for me when I find out I have a chance to interview somebody. This happened recently with Tom Bissell's book. It arrived and was nowhere near the top of my pile - but, his name was all over the blogosphere and I found out from his publicist that he was able to do an interview. Suddenly God Lives in St. Petersburg was on top of my pile.
How big does your TBR pile have to be before you quit buying books? For those of you in the position, how big before you quit requesting review copies?
Do you mentally plan (or for the more anal of us, write) out the order of the next 5 books you'll read? The next 10? How fan will you plan and then what will it take to knock you off of that course?
Where do you keep your TBR piles? Mine are generally in boxes, but I also try to keep a stack or two by the television - it helps remind me to turn the damn thing off and open up a book. I also keep one or two in my car at all times - you never know.