Going to ignore the question of benching Sanchez, or who should be the starter, yada, yada, yada. Save that for some other thread.
As the title says, IF Tebow gets substantive playing time, put him the shotgun with Spread formations the entire time. Split 4 WRs, or 2 WRs and 2 Split Ends out wide, or even empty out the backfield and go 5 wide. Open things up and let the kid air the ball out.
Additionally, go uptempo and no huddle. Give the defense as little time to react/adjust as possible.