This is just a little one, but it's super easy to learn.
Keep all of your “itchy creams,” antibiotics ointments, aloe gel (sunburns) in the fridge. Anytime you need them, the fact that they will be cold will help relieve the itch or help numb the pain. And will have no adverse effects to the medicine.
Also, keep a small spray bottle of apple cider vinegar in the fridge too. Use it on sunburns. It takes the pain away for hours.