When did the Super Bowl become a national holiday?  It seems like you must be either attending a party or throwing a party to not be considered a total social reject. Here are some great ideas for savings. Super Bowl tips from coupon site BeFrugal.com founder Jon Lal: If you are throwing a party: o Use an online service like Eventrbrite for free invitations & tickets. o Go with a potluck style party – where attendees each bring a dish – to reduce the expense of throwing a party. o Purchase supplies like decorations and paper plates in advance. Plan ahead…