As much as I dislike interest charged to our Citi balance every month I do have a way of getting some of that money back from them using the Thank You network. I added up all the interest for 2011 and it came out around $600. I went to the Thank You network and added up all the gift cards we've redeemed in 2011 and they added up to $510 dollars!
I'm not sure how we get so many points but I do know that our Citi Forward credit card gives 5 ThankYou Points for every $1 spent on purchases at restaurants (including fast food), bookstores, music stores, video rental stores and movie theaters and 1 ThankYou Point for every $1 spent on all other purchases.
Credit card rewards are good but at the same time I think this is also one of the reasons we continue to have debt. When I'm eating out I usually charge the purchase just to get the extra points. I have the cash in the bank but I tend to forget to send that money back to Citi.
Also look at this post from 2010 when I redeemed close to $1,000 in rewards from Citi: http://www.ourdebtblog.com/2010/03/citi-thank-you-rewards.html