Being invited as a guest by family or friends on a boating excursion, there are ways to make things easier for the host or hostess.
A great goodwill gesture is to bring food along. It is helpful to be aware of space on board such as size of icebox or fridge when deciding on your contribution to meals. For instance for a day outing a picnic lunch may be in order.
Offering to chip in for fuel will be appreciated by the boat owner.
Once the trip is complete, offering to help clean up will be appreciated. There may be many jobs such as taking the trash, washing off the boat, and helping organize the equipment.
Help out wherever you can, being sure to ask first.
An excellent resource for all first mates is Brenda Dawson's e-book First Mate 101