My visa account CC gives me a 5% kickback on every purchase.  I use it for everything I buy.  Then at the end of the month business cycle.  I pay off the debt in full, that way I get a 5% discount on everything, + I get to leverage the payment out for a month.   BY THE WAY!!!  This only works if you pay the complete balance.  So use your head when purchasing anything.
what card do you use?  I have a Citi card which gives me 5% back on gas, groceries, and pharmacy purchases but only 1% back on others and will only give me a total of $300 in rewards per year.  It sounds like you card is much better.