Here's one tutorial: http://powellminipainting.blogspot.se/p/tutorials.html
If you feel like getting yourself a book, I would recommend "Modeling US Armor of World War 2" by Steve Zaloga. It includes a chapter on figure painting for armour modellers (note the difference, "for armour modellers", not "for figure painters"). It helped me immensely with a sound down-to-earth approach on how to get good results without spending a 110% effort on every figure! And best of all (for me at least): using Vallejo acrylics!

Magnus