1. Pursuing a paycheck instead of a passion.
In your 20s, you’re likely still finding who you really are. You’re still allowed to be a little selfish and, hopefully, you’ve got dreams. Because of this, no other time in your life will be so perfect to pursue what makes you happy and what truly energizes you over financial success (which is a crapshoot, anyway). Anything creative and risky takes time to become lucrative, and you will never have this much time again in the rest of your life. Later on, you may have a house to pay off and children to take care of. Unless it’s where you see your retirement party taking place, that cubicle can wait.