For what it is worth, I keep a strict budget, keeping track of my spending on the computer. (money.stackexchange.com)
After all, it's easy to spend too much when you use your card for a majority of purchases and don't keep track of spending. (gobankingrates.com)
I'm pretty good at keeping track of my spending because I have a good memory, only use cash for weekly expenses, and have a set budget. (businessinsider.com)