I'm also within walking distance of a used bookstore. Sure, I'm within a quick drive of a Barnes&Noble and a Borders, but it's far easier for me to generate the willpower to resist the impulse to purchase full-priced books. But inexpensive used books? Oh, that's a problem. Last month I went in "just to look around," and found a stack of those Chaosium short story collections, all half off. So, yeah, I bought a few. And another book by an author I've just started reading, and a history book. See, they have, in a quiet back corner, a History section, and a Military section. When you're in a confined, quiet space in a bookstore, surrounded by books that are all potentially interesting, it's far, far too forget about minor things like, say, getting back to work. Last week I wandered over there questing after a specific book, didn't find it, but still emerged with six books. Admittedly, two were for my wife, but that's just a way to assuage my guilt. (The other four were all history books. For some reason, I can usually resist buying novels, but the "Ooh, I wanted to read about that…"/"Hey, another book about that time period! Must have!" impulse hits me hard with history books.)
So what's the problem with buying books? Ah, I have too many already, you see. At last count, including the new books, I have 52 books to read, and that's not counting a bunch that I won't ever read through at once, but that I have for reference (e.g., Who's Who in Medieval England, Modern Military Weapons, a few books on camouflage, aircraft recognition guides, vehicle recognition guides…).
So that's one book a week, right? Oh, if only I read that quickly. I was actually surprised that I only had 52 books, as I had 44 the last time I counted, which was about a year ago. Only increasing the Unread total by 8 books…oh, wait. I forgot about the Skunkworks book and the four RPG books I have on my desk. Dammit, 57 books. See? I just don't need that sort of temptation.
I'm just happy there's not a gaming/miniature store in the immediate area.