Sneakers41 - I agree that blending your foundation along the jaw line is critical if you want your makeup to look natural.
I have a Bobbi Brown makeup brush set that I use to apply my makeup with.
It comes in a little bag that makes it easy to take with you anywhere. The quality of the makeup application does appear much better with the use of these brushes. I get near perfect blending with the lip brush when I apply my lip liner and lipstick.