If I may suggest one thing, it's something I am currently learning in Oatley Academy, but think about your strokes when you use them. What do I mean by that?
Brush Economy. Making each brush counts
http://www.ctrlpaint.com/blog/stroke-economy
http://emptyeasel.com/2008/09/16/painting-with-economy-3-excellent-examples-of-why-less-is-more-in-art/
It will save you time and making you think how to design what you seeing with shapes etc.
-
Of course I do not know what your target goal is, but it's something he mentioned that most beginning artist or even intermediate artist still do, is just throwing around different brushes without thinking about the marks they're putting down.
Because at some point the amount of strokes you use on the canvas becomes way too muddy due that
A ) You're not thinking about the strokes
B ) Just throwing down semi-transparent blobs which then becomes a bit muddyish
-
Keep going, and keep applying