I once took an evening art class at Walt Disney Imagineering provided by concept consultant and pro artist, Ron Pekar, where we explored various art forms and techniques. It had been a long time since I’d touched any art supplies, and it was in this class I fell in love with watercolors.
I admit I don’t take as much time as I’d like these days to play around with paints, but when I see a site like this one, I get inspired all over again. WetCanvas.com is a resource worth bookmarking …
Also check out their excellent article (with illustrations) by Arnold Lowrey called The Control of Water in Watercolour.
Thanks to Douglas Welch for pointing out this superb site.