Leave it to Yngwie to say one thing in an interview that actually solves a problem I've been struggling with for a long time. There was a question about speed (with Yngwie of all people) and he said "If you don't have your left and right hands synchronized, you'll never play fast." Now, this seems like common sense, but it's one of those fundamentals that seems so simple you don't think about it. The most effective way to synchronize your left and right hands is to play with a metronome (or equivalent) only at a speed that you can play the material perfectly. I've heard this over and over, but sadly I had gotten away from metronome playing for a long time. Since I started incorporating 5 minutes of steady metronome scale playing a few weeks ago I've already started to notice improvement in my fast scale playing. Yeah, I'm kind of a genius. Or an Idiot Savant with heavy emphasis on the former.