Watch the Workarounds online guitar lesson by Rich Maloof from Acoustic Guitar For Beginners
Another option for getting through a tricky chord change is to play just a part of the chord rather than the whole thing. You may be able to play only the upper or lower voices. The character of the chord may still come through enough to get you over the rough spot.
If playing in a band context, rest while another instrument plays the chord change. Just make sure you know where you are in the music, so you can come back in at the right spot.