If you have a card tailored for a specific purpose, such as bonuses on money
spent at grocery stores or points for the miles you fly, make sure you use it
every time you go to those places. If you are able, put large purchases on your
credit card. Make sure you have the money to pay for a big purchase, however,
because if you are unable to pay for it, the interest rates will end up costing
more than they are worth.