Best introductory analysis book?

[DarkEternal]

I need a recommendation for the best introductory real analysis book to use for self-study. I haven't really had much experience with rigorous proofs and also need a good introduction to that. This coming year I will be using Rudin's Principles of Mathematical Analysis, so any book that would prepare me for that would be great. Thanks!

[graphic7]

From what I've heard Rudin's is supposed to be top-notch, very difficult, though. I had a friend that used Bartle's "Elements of Real Analysis 2nd Edition", and he was pleased with it. Some people say that Rudin's text shouldn't be used at an undergrad level, I can't say I know (being a physics major).