If it's not for speed, you could get your windows tinted if they aren't already. Along the lines of the Blackjack comment, go put the $150 in the field on the craps table. You win, you double your money instantly. If the shooter throws a 2, 3, 4, 9, 10, 11, or 12 then you win. Most casinos also give you a bonus if a 2 or a 12 is thrown (look for circles on those numbers). Many casinos pay 2x your bet when a 2 or "snake eyes" is thrown and some even pay 3x your bet if a 12 (commonly called a 'midnight') is thrown. Good luck!