quite a few "less extreme" tips can be found here...
201 Tips To Save Gas
this is the 201 tips to saving gas on the top of the screen.
I would say to invest in a scangauge 2 or ultragauge. they are worth their weight in gold. I actually have both and prefer the scangauge but it is probably more because I got that one first. both do basically the same thing. the ultragauge is about 60-70% of the price of the scangauge. that makes the decision a little easier.
regardless, welcome to the site.