I want to go to the casino and play blackjack any tips?

its my first time..i've been playing online and thinking about giving it a shot at the casino tonight just want to know if anyone has any tips or advice also what would be a good amount to put down/start off with? or if anyone has any tips on roulette i've played that a few times but never really won alot off of it..never lost but never made alot of profit so if anyone has any tips on roulette that would be cool also craps?? how do u play it??? anyy tips or advice would be great!!! thanks!!!!