Today's advice isn't based on personal experience, just something I've observed with others:
Families are great. You should love your family. But just because they're family, doesn't give them the right to fuck you over - you're allowed to say no (particularly in financial situations). Alternatively, if you're borrowing money, or loaning money, to a family member, you be damn sure you're fair about it.
Websites of the Day:
Photo from Mad Men. For the guys out there. Particularly guys who like gravity defying redheads. (SHould be work safe though)