In this economy, who can afford to pay full price?  With the Discover Card cashback bonus card, you earn 1% of all purchases.  In addition, they offer a 5% cashback bonus in certain categories.  The categories change every 3 months.  This quarter you can earn 5% on Home & Fashion purchases.  Next quarter it's Gas & Hotel purchases.  The max you can earn with the 5% bonus is $20 a quarter.   If you exceed that, you still get the 1%.  If all this isn't enough, you can also go into their "shop discover" site.  There are some major stores in the program that offer anywhere from a 5%...