What should you do if you want to stop a trailer skid?

Stop Using the Brake: Release the brakes to get traction back. Do not use the trailer hand brake (if you have one) to \"straighten out the rig.\" This is the wrong thing to do since the brakes on the trailer wheels caused the skid in the first place. Once the trailer wheels grip the road again, the trailer will start to follow the tractor and straighten out. [California Commercial Driver Handbook]