Oddly enough, yesterday, I just finished my first David Bach book, Go Green, Live Rich.
I started making oatmeal for breakfast, which ends up costing much less than the expensive cereal I was eating. I use stainless steel water bottles instead of bottled water. I avoid going out to lunch as much as possible and typically bring brown rice or quinoa that I make at home. Unless I have court, I try to avoid wearing clothes that must be dry-cleaned (for both money and green purposes).
I've also cut back on some of my favorite girly activities. Eyebrow threading was gone. That saved $15 every three weeks. Pedicures have been cut back significantly. Went back to my natural hair color (which I cannot complain about because it is still blonde). Cut out regular facials. Less frequent hair cuts.
I've also switched to all natural green cleaners, which I believe will eventually save considerable money since the ingredients are extremely inexpensive and will last much longer.
My favorite tip came from a friend about a year ago - if you get the newspaper, only get it from the dollar store. So much cheaper. I can get it for $1.51 cheaper than the regular price on Sundays.