Go full Home Alone: paint cans on strings, broken ornaments by windows, and a recording of ‘Angels with Filthy Souls’ to scare them off.
Boil water with sugar and keep it ready to throw on an intruder—it’s called ‘prison napalm.’ But honestly, barricading the door is probably your safest bet.
Order a can of Surströmming, open it, and rig it to spill on them if they enter. That smell alone will send them running.
Stay awake and prepared. We need an update tomorrow, OP!