A stocked first aid kit is the difference between handling a small injury at home and a late-night trip to the clinic.
Covered here are the basics worth keeping in date: adhesive plasters and sterile dressings, antiseptic solutions and wipes, gauze, tape and bandages, burn gels, and instruments like tweezers and scissors.
Keep the kit somewhere cool and dry, check expiry dates a couple of times a year, and restock what you use. Deep wounds, burns beyond a small area, and anything that will not stop bleeding need medical attention rather than a plaster.