Going over your credit limit can result in declined transactions, over-the-limit fees and a possible decrease in your credit score. Among the ways to avoid credit card fees is by setting up alerts that notify you if you’re approaching your credit limit, as well as making on-time payments and paying down your card balance as soon as possible.

I thought it would be a good idea to open a new credit card. However, in the year since, I haven't used it at all.

Credit cards are incredibly useful and deserve a spot in your wallet. But only using credit cards to buy everything can be a bad choice -- find out why now.