Never Pay Full Price for:

Toothbrushes or dental floss.   Have you seen how much toothbrushes cost?  Sometimes four to five dollars, depending on the brand and that special "grip."  With coupons, you should be able to get a decent toothbrush for a buck (same for dental floss).  Also, check out the dollar store in your area - cheaper toothbrushes can be had for about twenty cents each, a bit more for the "premium" toothbrushes.  Dental floss also can be had for a buck a the dollar store (including bags of those little plastic handled flossers).