No magic bullets here! the only way I know is to use regular gas (not premium or mid-grade), keep your tires properly inflated and dont drive fast. I can get 25mpg in my 00 if I drive 65 on the freeway (which I really cant do often) usually its 23 at 70 or so.
Just be happy the gas is what it is by you, because I can GUARANTEE you its a lot more here. My favorite cheapo gas station just jacked the price of unleaded regular to $2.99 this morning!!!
Gas in Buffalo is at $3.24 geez rediculous huh?