Find the highest end equipment to gain exponential ground on money saving basic noobs. Here is a chance to separate yourself from the noobs who play consoles that have to fight each other basically using the same equipment. The higher end you go, the more you separate yourself from the PC peasants as well. Go to school and grab an education in case you need a high salary job to afford this route. You can also find someone to teach you a trade skill if school doesn't work out.
When typing a reply to a troll or someone that just insulted you, make sure you spell every word correctly. You want to keep the arguments and insults down the narrowest path as possible.
Don't show emotion if you get owned. Just keep playing and get better. Winners keep playing until they win. Losers quit. Only time it is OK to quit is if you have to support yourself with your own money and not mommy and daddy's money.
Go into empty servers to test out your configurations so you have less to configure during high action gameplay. For instance, your mouse sensitivity. I have to emphasize that your mouse sensitivity will be a large part of whether or not you will have fun in the game. Don't get frustrated, spend time tweaking your mouse sensitivity. Same goes for your keyboard. Be happy that learning your keyboard for gaming will give you the leg up in the business world as well.
Never boast that you spent 1800$ dollars on headphones or 1000$ on a processor and video card. Just quietly own noobs and let them accuse you of hacking.
Never act like a child. Other experienced gamers will pick up on this and use it to their advantage. Experienced gamers will try to use your psychological thought processes against you. Be strong. Don't get butt hurt.
Most importantly, just have fun.