Nothing. I've talked and talked about getting a motorcycle, but it has nothing to do with gas prices and it would be just a toy.
I'll still drive my V8 truck and my wife will still drive her Pilot. I don't mind paying the extra if it means I get to drive what I want and how I want.
And I love hearing people say that SUV's give people a false sense of security. My wife was rear ended on the freeway last year. She was in stopped traffic and a 2001 Civic plowed into her because she was picking up her cell phone off the floor and didn't realize that traffic was stopped. Because of the height of the Pilot compared to the Civic, it simply jammed underneath the Pilot. Damages to the Pilot were under $500, just touch up stuff and a bent exhaust tip. The Civic was done. /rant off

I've eyed the Toyota Yaris, but only because it looks like it would be a cool little car. I'd still keep the truck.