Put Away Valuable and Delicate Things
To make a party really memorable, you'll also want to prevent bad things from happening (otherwise that's all you'll remember from that night). You might be really sad if your great-grandmother's antique vase is accidentally pushed off the shelf, so store it somewhere safe. Same goes for valuables – though you'll likely know and trust everyone at your party, the longer and larger the celebration, the more likely friends of friends of friends (i.e. strangers) are to show up. It's better to be safe than sorry.