Firstly,
I would like everyone to watch this simple playback of a illustration done in DS colours by young hero Whit Brachna (aka Mr. Blonde)
http://colors.brombra.net/details/5597-yet_another_girl_by_mr.blonde.php
A talented young artist, having established a fearsome reputation and style and poise already in the concept world.
One thing to take home is, if you need to paint better, faster, or more effectively. Paint slower. Make your strokes more calculated.
As mentioned before, paint slower to paint faster. Make less random marks or scribblings.... And like rowing a boat effectively, you can pull through water with less effort, but high efficiency, instead of paddling yoru boat with a thimble in hand
Anticipate your value structure, becasue once the forms and composition are all set right, detail is like the final gloss coating of chocolate sprinkling on a perfect mocha cappucinno.
Lastly. Whit proves you really really only need one Uber brush. No fancy gimmicks. No fancy textured brush. Just one brush.
The hard round brush
(i'll let you think on that one)
koshime.com