Here is some OCS advice. Deprive yourself of sleep. Scream all of your responses to people, and only speak when spoken too. Practice eating an entire meal in under 5 minutes without ever putting your hands on the table. After lunch every day, sit in a comfortable chair and watch the most boring thing possible on tv for 2 hours in air conditioning, and everytime you fall asleep have someone throw ice water in your face and scream at you. Load bricks into a backpack and go for 3 hour powerwalks. Find the nastiest, most foul mud puddle, piss in it and throw in some dead fish, then put on a long sleeve shirt and pants and crawl through it, putting your face halfway in the water. Oh, and be sure to practice holding a pack straight out in front of you until you almost cry. Then hold it out longer. And just when you can't take it anymore, when the light at the end of the tunnel is almost out, you are halfway there. Anything less and they would call it the air force.