I made this TabIt file a few days ago about Diatonic chords progressions (i.e. chord progressions that stay in key). Well, the tab was about how to get around it, and use more than just the same seven chords, without needing to change keys.Check it out if you're interested in making your music more interesting.
And now we are up to date. Seeing as how this is a tutorial, I think you should sticky it.