Back in high school football (american football), we did a LOT of short distance agility training, which has helped me a lot in the paintball world. One good drill, take some orange cones (or any other easily visible objects) and drop 4 in a line with about 5 yards between them, then run a ladder. Start at the end line, sprint to the first cone, touch the ground, turn and go back to the start, touch the ground, turn and sprint to the 10yd cone, hit the ground, turn, then back to the end line, the do the 15 yd, and back to the end line. Make sure you touch the ground at each marker, and face the same way each time (so half the time your turning left, and half the time turning right). This drill is HUGE!!! It gives really excellent sprint training, and because your touching the gound at each turn, your practicing exploding into the sprint from a low position.
Another good one is to set 3 cones in a line, again with 5 yds between them. Start by standing over the middle one, standing with no preference to a side (you can either have someone point a direction to you at the start of the drill or just decide your going one way). When the drill starts (if you have someone there have them yell "go"), sprint to one cone, touch the ground, then sprint across the middle line to the other cone, touch the ground (again facing the same way so you touch the ground with both hands), then sprint across the center line.
I should warn you, I am by no means a top level baller, those drills are things I picked up playing high school football, these are football oriented drills. I can tell you those two drills, done at top speed and repeated as quickly as possible, will give you great acceleration, especially from a low stance (i.e. the "football position").
Just be careful to stretch before, and after doing these (as you should with any workout).