A set of boats stands are useful - you can use them for storing your kayak of surf ski in your garage, or while performing cleaning or maintenance.

Compact boat stands are handy to take with you in the car - a handy platform for standing the kayak/ski on while washing it down. It's a great idea to wash off the salt before loading up you kayak or ski - saves dripping salty water on your car!

Storage racks are fixed to some firm surface such as the masonry in your garage.
If drilling into paster walls make sure you are drilling into the studs.