I'm going to be on a sailboat in september until I dont know when. i need a way to make money while im gone.?

im currently working on a cruise and im saving all my money so i will have money saved up. but what i need are good ideas to keep make money while im gone. i dont know if i'll have access to the internet yet. just give me ideas , thats all i need. and please dont give me stupid answers, it's a waste of both of our time. thanks so much!!!!!!!