I've done it all. Plus you forgot filching samples, joining a coupon club, buying all clothes(cept socks, underwear, and bras) secondhand, watering down shampoo by half, using cheap hair conditioner instead of shaving cream, getting hair done at beauty schools (sometimes for free!!!), haggling shop clerks, picking up furniture by the side of the road, joining a co-op, and buying in bulk. XD
Also, if you shop at Walgreens, they have a rebate and rewards program to take advantage of. If you play your cards right, you end up paying nothing but tax sometimes.