Line Burn sucks.  It is a good idea to cover as much skin as you can.  Gloves, pants and long sleeve shirts are a good choice. Long, thick socks help prevent line burn your ankles during normal docks.  Choice of footwear is very important.  Make sure to have shoes with no snags that can be kicked off in the event of an emergency.  A lot of emergencies can be solved by kicking off a shoe.  Taking a cell phone for off landings is never a bad idea either.