Our good friend CMDante has put together a post full of painting tips on his blog Dante's Inferno. Things like brush care, holding sub-assemblies, wet palettes and brush selection are covered with some quick ideas on each.
My favorite tips from the bunch are the use of larger brushes and the brush stroke directions. These are two things you really don't think of as major factors when you're painting a model, but they are important to saving time and creating smooth looking blends and surfaces.
