Okay, I'm one of those peole who has a big library and a memory that doesn't do titles well. So often, I'll go in, go to my favorite section, check out a book and start reading it, and realize I've read it before! It's fairly exasperating for me. But I recently was directed to a site where you can keep track of your books for free! So I checked it out:
http://www.librarything.com/
The caveat? It only lets you store up to 200 titles for free- after that it's $10 a year or for $25, you can have/update/whatever your list forever... not too bad, but if someone is on a budget, or doesn't have a way to pay the online fee, then it gets tricky.
While I like this, I was thinking an excel spreadsheet might be the way to go, too. Does anyone else have a way to keep track of the titles they read?