In order to avoid easily preventable spoilers of summer leisure time fun and travel, we at ACSH encourage you to take seriously the tips given above. It is our hope that they will help you to have a happy, healthy summer vacation! 1. Moderation is the key in sun exposure. If you are going to be out in the sun, use broad-spectrum sunscreen protecting you from both UVA and UVB rays. And make sure to use a sunscreen with SPF 15 or higher, though most experts advise against going over 30. Reapply sunscreen often, especially if you are going in the water or sweating.