Yesterday morning early I stumbled on Jeff Mahorney's blog in which he discussed what he learned from doing 120 paintings. He has it listed under "What I Learned" just under his portrait (http://jmahorney.blogspot.com). There is a long and a short version, but don't miss the long one. It is a concise distillation of many technical and creative issues and I found them extremely helpful and even comforting. He also has a really interesting blog, don't miss it!