I've never tracked my reading before. Which is the main reason why I started to track it this year.
That decision was before I got the iPad! Now, I am seriously distracted by it (games, RSS feeds, forums, etc.). I'm still reading stuff, just not books.
Plus, school has started back up, so I have to make myself focus more on that versus reading (and yes, I have to limit the iPad time too).
I figure I'll still hit 100 books, but this won't be an accurate measure of what I've done [normally] in the past. I am, however, certain that it's going to be a good measure of how much I read in the future ... given that I'm not giving up the iPad!
Marilyn