Don't Get Burned Twice
Don't let yourself forget how much sunburn sucks. Use your current misery as motivation to get in the habit of applying broad-spectrum sunblock every day, especially through the rest of the summer. Look for one that is SPF 30 to 50, guards against both burn-causing UVB rays and wrinkle- and cancer-causing UVA rays, and is water-resistant so it'll stay put when you sweat or swim. Mineral-based blocks with zinc oxide or titanium dioxide tend to work best. Apply 15 minutes before heading outside, and reapply every two hours.