Something else I just tried last weekend that is extremely helpful when doing studio type work is shooting tethered to your lap top.
Instant feedback with each shot. Way easier to make adjustments when seeing your image on a 15" screen versus a 3" screen.
Considering all the software to do this comes with each Canon camera, there really no reason not to do it unless I guess you don't have a lap top or a near by computer.
If you have not tried for indoor work, you really owe it to yourself to give it a go.