One improvement item that has given me back my money and more tenfold is my beloved Kindle. It may sound lavish, but I've vowed to take the bus more often (and read on the device) instead of driving places and paying for parking.
Consider this tactic for your individual needs: Feeling sluggish and out-of-shape? Stock up on something FitSugar-approved like new kicks. Want to save on food bills? Learn from YumSugar and snag something that will encourage you to cook at home more often.