Think for yourself. Unplug yourself from follow-the-follower groupthink, and virtually ignore what everyone else in your industry is saying (except the ones everyone agrees is crazy). Do your own research, draw your own conclusions, set your own course, and stick to your guns. When you're just starting out, people will tell you you're wrong. After you've blown past them, they'll tell you you're crazy. A few years after that, they'll (privately) ask you to mentor them.

Risk the stuff. It's worthless anyway. But don't make the insane choice of sacrificing your happiness for stuff.

For good or ill, your habits will make or break you.

Imaginary testing is unreliable, and in many cases, it's a huge waste of time and energy. In truth you just don't know what will happen until you try. You may start a business, and it could take off in ways no one could predict. Or it could be a complete failure. You could ask for a date and end up with the partner of your dreams. Or you could be rejected cold. It's great to visualize what you want, but you never really know what's going to happen until you act.

Network selectively. Nothing says "business newbie" like shotgun networking. "You never know when someone might say yes" is marketing for dummies. Take the time to build a profile of your ideal customers, and target your networking activities to reach them. Speak to those who are already predisposed to want what you offer. Almost any profile is better than "anyone with a pulse."

Regardless of others' reactions, do your best to stay true to yourself. Make the choices that allow you to look in the mirror and feel good about the person gazing back at you.

People in their early 20s are invariably weird.