Can't believe no one's suggested Finale! Finale has become such a large program with so many features, that it is not so easy to understand the full potential of the app.

With MPV releasing tutorials for Sibelius, I'm guessing it's going to be a while before we see any Finale tutorials! :-(

With the wide variety of tutorials available from MPV, I might as well throw this one out there as well: FileMaker Pro. This is one of those app that can have numerous parts: from beginner, to immediate to advanced...not to mention it can be quite daunting a task to figure out how to do what you want to achieve.