Masturbation Tips please?

Any one have tips on the best way to masturbate in private when your family is almost always home? And you share a room with your little sister. (well, she's 13 I'm 15) But still.... I normally do it when everyone's asleep but my bed is kinda loud %-) :$

And if anyone would mind sharing their favorite way to masturbate that would be awesome. :-D

PS: Im a girl