Last month I drove about 240 miles, the month before 0, and this month will be 180. I'm flying 2100 on Saturday, though
I don't drive enough to actually justify trying any modding myself yet. However, changing my driving techniques was easy, free, and wicked effective. I almost hit 40 mpg on my last tank in the automatic '92 corolla without any mods!
I dread the day where my months will be so routine I could easily answer this question :P