<3 Thanks guys.
I have found a use for OpenCanvas. Doing lineart in OC is so, so, SO much easier than Photoshop. I will now use it for lineart. Plus, it can save in .PSD format. HAPPINESS ABOUNDS.
Uh, anyways.
Not much. Just a boredom doodle. Coloring is so much fun-!
Yeah, Buddhu, think of coloring as kinda like painting. Set the opacity and flow a bit lower when you shade (Usually I use about opacity 90% and flow around 15-30%) And instead of using the eraser to clean up shading, unless you're going for the cel-shading sort of look (which I suck at, don't ask me for help on that XD), just set your second pallette color as your main base color and color over your mistake. If you have a tablet, ABUSE ABUSE ABUSE the pressure sensitivity XD. You can also gradually color over your shading abusing the opac/flow. It blends the colors nicely and believe me, looks much better than smudge/blur.
Oh yeah, and I would go into your brushes menu (on my screen it's that tab next to "File Browser") and set Brush Spacing to 1%. That's good both for smoother shading as well as neater lineart. Well, I find it so, anyways.
Yeah, and unless you're supar lazy, stay far, far away from the burn/dodge tool for shading/lighting respectively. I sometimes use the dodge/burn for coloring eyes, but that's it. They can sometimes make the colors more vivid or dark than you want. And more often than not it looks rather ugly ):.
Hope you find that somewhat helpful. Try to find a style of coloring you're comfortable with. The way I do it allows you to be rather messy and still be able to make it look pretty ok.
Oh, one more thing. When choosing colors for shading, try not to use colors from the same pallette (like shading red with dark red and so on). Try to use dark shades of different colors (Like shading red with dark violet). Unless the color you're working with is, Idunno, black or dark gray or whatever. In which case you probably want to shade with darker shades of said color, and do the lighting according to the background/surroundings. I think my explanation made very little sense. Oh well. But yeah, think color wheel/color triangle/color whatever the heck people learn in school these days ): I learned it as color wheel in elementary school, then come high school, my teacher was calling it a color triangle. Yeah whatever.