There's nothing worse than cutting yourself and realising you have no plasters or antiseptic ointment in the house. You can no longer go running to your parents if you're hurt, so make sure you have a Basic First Aid Kit (£8) at hand.
Top Tip: It's also worth stocking up on the most likely over-the-counter medications you might need, like painkillers and antihistamines, so you don't have to run to the shops when you're not feeling well.