A good way to get needed diapers! Free diaper raffle printables for you next baby shower (pink or blue). You can tell your guests about the raffle before hand, or you can leave it a surprise for whoever happened to include diapers in their gift.
15 Entertaining Baby Shower Games via Pretty My Party I really like the "don't say baby" game, the "guess how many jelly beans in the bottle", and maybe some others. But those two are fun and require minimal effort.