6. Playing higher stakes as soon as you win a bit of money.
This is a great idea if you want to go broke. Winning a few hands should not be your reason for playing higher stakes. You should only start playing higher stakes after you have proven you can consistently make a profit at your current level. Anybody can get lucky and win some quick cash. Make sure you have been making a profit for several months/many thousands of hands before increasing the stakes. Improve your poker game.
Don't be a Poker Fish!