http://www.ctrlpaint.com/

So uh. I actually discovered this website on a journal here on FA, but that was weeks ago and I can't remember who the person who linked it was. But this place is the reason I was so productive a couple weeks ago. This guy posts tutorial videos on various digital painting and photoshop techniques a couple times a week. I've learned more here in a few days than I have in years of experimentation. Like for instance, I just watched the video on brush control basics. I ALMOST skipped it because I figured this was elementary stuff that I already know, but then he goes on to say that you should never combine width control and opacity control except in specific circumstances. I've ALWAYS had width and opacity tied to pen pressure. I try it with opacity only it's like HOLY SHIT, how did I ever get so far without knowing this? Everything is so much EASIER now.

Start out with Digital Painting 101 and then work your way up from the last page. I might have to buy some of his longer videos. This guy is doing a great service to artists.