I haven't done anything really crazy but I am cutting back here and there and changing the way I do things.  I'm using my clothesline a bit more this summer  because air drying clothes is free.  I'm not doing it to save money but it helps.  I also shop quite a bit at Aldi.  As for gas saving, my DH and I try to carpool to work at least once a week and I've stopped driving like a maniac.  I tend to drive fast and crazy so I'm slowing down and coasting more instead of being a leadfoot.  We also buy most of our meats from Costco and freeze them using our Foodsaver which means a huge savings over grocery store prices.