Before heading home last night, I stopped at a CVS store to buy a bunch of supplements so I can grow to be a big healthy girl and build my immune system or whatever they call it. At the end of my shopping, I noticed that I'd saved about $65 during that trip and tweeted about it: A lot of you were curious how I pulled off such an impressive bargain so here goes. First, I have a CVS card that allows me to get discounts. Three of the supplements I got were "buy one get one free"