Nice article about how to find deals on the net for certain things you are looking for. I already knew about signing up for price alerts at amazon/newegg/etc. And have used camelcamelcamel in the past. Also have filtered email as well. But plugins InvisibleHand and coupons at checkout are new to me. They sound cool (IH points out other items cheaper, CAC pulls coupon codes for you at checkout) but…what are they recording from you in the process? Oh and there is a chrome only one called Honey that sounds neat too.
http://lifehacker.com/5978851/how-to-automate-your-discounts-and-always-get-the-best-price