1: One or two bottles of purified water. So you don´t dehydrate.
2: Energy bars or something to give you food and energy/lots of calories. So you don´t starve.
3:A multi tool or a knife. To defend yourself or use the tools.
4: Extra clothes. So you can change to stay warm.
5: Big bandages, an ounce or two of rubbing alcohol, and pain killers. This will help you stay healthy
That is my lightweight bedside kit hope this helps you.