I don't like people here who make me slow down...The main street has lights timed so that if I go 35 MPH, every light will be green when I get to it, but people always pass me and stop making me slow down and using more fuel to accelerate back to 35.
I adapted this by going about 32 MPH because this usually gets me to about 100 ft behind the stopped vehicles when the light turns green allowing them to accelerate and me to maintain my speed. I dunno how much fuel it saves, but I know it gets me to the freeway just as fast as those other people.
I'm also thinking about a methane injection system, but I don't know how effective it will be or the specifics of how to make it work. Right now I'm figuring out how to put a funnel into my seat without making it look like crap or making it uncomfortable.