The second is for 0% offers. If I'm going to buy something large and someone offers me 0% for 6, 12, 18 or whatever amount of months, I take it. Then I log into their website and schedule automatic payments for the exact amount required to pay the entire thing off in the timeframe required. No worries about missing a payment or screwing up. After the purchase I also cut up the CC. Now I can have the cash I was going to drop instantly as a backup if something goes wrong in life.