The 13 dumbest things to do with your money in your 20s

When it comes to managing money, your 20s are a critical decade.

Time is on your side when you're young, and a head start in saving and investing can result in massive financial gains later down the road.

It's equally important to get into the routine of making smart decisions. "You don't want to start bad habits in your 20s that will lead to potential financial mistakes down the line," Brad Sherman, president of Sherman Wealth Management, tells Business Insider.

To get on track financially, start by avoiding these 13 pitfalls: