I REALLY like the book idea above. It also gives more motivation for people who don't live in the house to come there and visit and lessen the house sisters/non-house sisters division.
We had a weekly Sister and Boobie award at meetings - sister of the week did something awesome (like starred in a university theater production) and boobie did something silly (like forgot to take off her slippers and walked to class with them on). It got the meeting off to a lighthearted start.
If you use a points system, make sure it is a positive one (i.e. you are working towards getting the most points so you get free formal tickets) and not a negative one (i.e. if you don't get the minimum # of points you can't go to formal). If systems are geared toward the "least minimum" that's what many people will do - that's just human nature.
When choosing your standards board, make sure the girls are from different classes and MOST importantly, that they aren't all best friends or in the same clique. The last thing you want is to give the impression that SB is skewed towards one particular group of girls.
Good luck!! Also - remember when posting on the ASA app on Facebook - it is not a private app and anyone (from PNMs to other sororities) can read it, so be discreet.