There is a common trap that quite a few people fall for and it doesn't hold back your development, so it can be tried safely even if the person doesn't fall for it.
After b4, you can play a4. If black wants to hold on to the pawn using c6 (a6 doesn't do as the rook would be under attack after aXb5), you can simply go ahead and capture - axb6, cxb6 Qe3, winning a minor piece/rook.
Be6 to protect the pawn is bad as well because it hampers development and it is easy to push the d pawn to d5. e.g. after playing Nc3, you can go ahead and play d5.
I was wondering what other people's strategies are for white in the following opening variation of the Queen's Gambit Accepted: