BY ROAD: 

Drive to Liverpool, park up and board the Fast Cat ferry, arrive in Douglas, relaxed and rested a couple of hours later.
Advance ferry booking costs about £20.00

BY AIR: 
Isle of Man is easily reached by air.  Easyjet fly from Liverpool airport to Ronaldsway Isle of Man. www.easyjet.com

Manx Flights fly to the Isle of Man from almost any uk airport.  www.manxflights.com