What I Use I have both Adobe Photoshop and Paint Shop Pro , and I tend to use PSP a lot more often because it just feels better to me. This talented artist shows you how to create some really great effects using Paint Shop Pro.
Site also features free, quality clipart.
While geared toward Photoshop, it has good info that can be adapted to any good graphics package. Designs by Mark - Photoshop and Flash 3 tutorials, tips, and a gallery. ZDU - Online courses. I've taken a few classes from ZDU, including their Creating Web Graphics With Paint Shop Pro, and I highly recommend them. Offerings also include several levels of Photoshop instruction, web design, more.