I've always been a fan of the Help file, myself.
Although, admittedly they're not as good as they once were.
I have always been a fan of tutorials.
It might have something to do with the fact that I created the first Premiere Pro tutorials for Lynda.com, but I like the way that Lynda.com tutorials take you through a project from beginning to end, resulting in a finished product.
For free tutorials, I rely on the Creative Cow. They are free, but are very high quality tutorials.
The very first place to start is here: