I use the arrow keys. I use left and right to turn and delete and page down to strafe. When my hand is there, my pinky is on enter and my thumb is on the 0 key. I have reload on mouse wheel. Any time I need to shoot, my fingers are on all the right keys, and any time I need anything else, I don't need to shoot. Oh, and to get better at aiming, play minesweeper. If you can beat expert in less than 150 seconds, you get good at aiming. You have to click squares smaller than the average head really fast.