You have to run to the inside more often, and to do a sweep make sure you have it as an audiable in your plays. Then when you choose and inside running play for that same formation and you see the LB's move over to one side and leave a side over, audiable over to the sweep and change the direction of the run if you have to so you go the the side the LB's are not moved over to if you catch my drift.

I also like to have an audiable for the HB screen if I know the team is blitzing by moving some players around on the line and reading their coverage.