I'd say try to stay away from solid tackles. If the defender can make contact with their shoulders or chest, they are going to make the tackle unless you can run through them. You might want to work on you feet coordination. Stepping to the sides makes it more likely that the defender will be making an arm-tackle. When the defender is tracking down a tackling, a good way to decide if you will move to the left or the right in by looking at the defenders hips. If their hips cross your face, you would want to cut inside. If their hips are too far inside, you would want to cut outside.

Run with a lot of momentum and run into the player with the intenions of knocking them down not falling be confident

Keep moving foward. While your running forward you should be twisting and turning and sawing your arns.

archie griffin - keep driving...