I would also make sure bilge, water and battery levels are checked every day. These tasks can be assigned to other members of the crew but make sure they report back to the skipper what they find.

A daily engine check (oil, intake, impeller, strainer) is also a good idea though that may be better suited for the skipper to do.

Prior to the trip, I would ask potential crew (especially newbies or people who haven't overnighted it on a boat before) if they are prone to seasickness and if they are claustrophobic (even on a 45-50 ft yacht, the aft cabin roof may be only a foot above your face -- difficult for people who are suffer from claustrophobia). Its no fun to be on a boat with someone who doesn't want to be there or who is not having a good time.

Don