I'm a visual/audio learner and I really got it with Eleanor Burns video on YouTube. It's a simple method but she's detailed (as an OCDer very helpful lol) and doesn't zoooooom through everything) - nice closeups, so you can see what the heck she's doing. My main complaint in many videos when you're trying to learn something new, too quick and no closeups.
Below is the link to the video. Then it's takes some practice, however with her method I found it much easier to get consistent results on all four corners of my mugrugs, portfolios, journals, wallarts, quilts.
http://www.youtube.com/watch?v=c85voeoj50Y
Hope it helps. Huggers, Ruby