This video gives tips on speed painting with the goal of getting them onto the tabletop, and not winning painting competitions.
Painting
Using A Wet Palette
Two good videos on using a wet palette for painting.
Painting Flesh On Miniatures
I have long had trouble getting large swashes of flesh to look right. This video is helpful.
The Complete Future
Matt Swan has a web page describing all of the varieties of Future acrylic floor wax, and their uses in modeling. Miniature Wargamers, of course, have discovered the use of Future in making washes that easily provide shading on painted figures.
Painting White
Painting white as the primary color of a miniature is hard. The video above offers some good tips. As does this one below: