Art Tip 22#: Use the largest brush you can to get the job done. This will help you stay "loose" with your brushstrokes. For tiny paintings, 6x6, 6x8, 5x7 I try to use #6 or #4 bright for the whole painting.
Use all edges, sides, tip, corners of the brush. Put the stroke down and leave it. Try to hold back any blending til the end..you may not need any blending. The action of laying one color over or next to another can result in all the blending needed. Don't forget to get back from your painting..the eye can do the blending. Result: a fresher more painterly feeling.