The day after Thanksgiving, the day after Christmas.

The days when people camp out, hoping to save a few bucks by standing in long lines.

But consider this: 40 percent of Americans are in credit card debt, so it's probably safe to say that a lot of us shouldn't have been shopping at all on Black Friday.

If you find yourself in that position, we got some advice from University of Denver marketing professor Ali Besharat:

"Use cash instead of credit cards. Second, have goals in mind – what you're going to buy and for whom. And the third one is having certain budgets in mind, and know how much you want to spend," he said. "Based on that orientation – you say , okay, I'm not going to spend thirty dollars more."

It's simple, and we should already know it, but sometimes we need someone to spell it out.

He says shopping and eating over the holidays are one in the same. We tend to overindulge, so try to be mindful.