Technique on Hills

[GeekGuyAndy]

I'm interested in finding out the best way to handle hills while still keeping a good mpg average. Driving a steady speed seems pretty bad overall since the gas is flowing and the mpg are low. I originally thought that trying to only accelerate on the less steep sections would help, which I think it did compared to my driving before. But is it even better to rev high for best power for a few seconds or to try to stay slower the whole time?

In high rpm, gas is used faster, but less time is needed. I guess what I really need to do is try different techniques on a hill nearby. Has anyone done a test about this?

How do you drive up hills?

Thanks