mystic badger, in case I haven\'t said so earlier, welcome to the forums.
Generally (there are always exceptions) minis are painted under a \"halo\" of light. Imagine a upper diffuse sourse of lighting (cloudy day, office, etc.) where shadows are under overhangs, and upper surfaces are highlighted.
If you are still having trouble, take some close up pics of things like someone\'s shirt - without flash (someone you know and ask first). Look at the differences in the color from the area under a fold/crease to the color on the top of that same fold. Our minds are trained to see it as a single color, but it never really is.
There are some good aids in the \"articles\" section here as well as several other good mini painting sites.
Post some pics in the WIP section and you\'ll get some good advise on improvement.