Well from what I can recall you just set down a base layer, fluctuate opacity and flow until you find your niche. Otherwise you're making art to robotic and anal.
The order from what I've read online and how it can appear in photoshop (All in gray scale,I mean if it can't look good in gray than it's not going to look good in color)
Color layer (Blending mode set to Color)
Highlights and special shit
Level 2 (Darkest darks) shade and refine level 1 with a 20-40% range
Level 1( medium darks) shading with opacityat 60%
Any background color besides white/black
I just asked the question because I'm seriously down in the creative aspect and want to work myself back up by revisiting the basics.
I feel like a guy who hasn't workout in 2 years needing to get back into things (I've been pretty lax in practice for like 4 months though so I feel like crap)
Thanks again Jonny I read both and found them very informative. I'll try and post "before and after" images of things I want to shade on my personal art thread. I found the boob example to be perfect. It showed that subtly just takes practice, and not to go crazy with levels.