Collect all your spare change and put it straight into a savings account. It might be just a little, but it will all add up! Also, if you do rebates or even surveys, put this "extra" income into your savings to help boost your account even more!
Use coupons, especially on products you would be buying anyway). There are coupons everywhere (in stores, in the newspaper, online) so you can find them for most products. Also, look for stores that will double coupons for even more savings!