There are months where I am really on top of entering in my transactions each night. And there are months when I am not very good at it. Sometimes life really does get in the way. It is important to keep a running total of your account, so that you know when to stop spending. It doesn't take long to keep up with it, and it can save a lot of hassle and headache in the future.
If you have a smart phone, you can easily enter in your purchases as you do them at the store, and keep up with everything that way. This would only take you about thirty seconds, and you can get everything ready while you are standing in line for check out. The apps today make it super easy to track your spending and to monitor your progress.