Or, and this is only from the "--- happens" school of acceptance/resignation, you could just accept the new flights and realize that even if it is inconvenient, at least you didn't get totally bumped.
But I have never minded waiting in airports. YMMV, obviously. I do know how maddening air travel changes can be. On my first cross-country flight, I had gotten front-of-plane window seats almost a year prior. Had plans to use my new camera over the Rockies. Got bumped to a middle section when they changed type of plane 1 week before. Turned out that the sky was cloudy the entire flight, not a single glimpse of the ground between DC and Calif.
Good luck!