The Sims Bustin' Out Tips

Keep Your Friends
Have at least 1 kid. Instead of sending the kid to school everyday, just have them go enough to prevent them from being sent to military school.

While they are at home, tell them to order pizza and invite people over. Kids seem to make friends easier than adults, and any friends they do make will count for the whole family. Promotions requiring friends will be much easier to obtain using this method.