1. Make your own frozen treats
Turn blueberries' powerful antioxidants into a nutritious, lowfat snack. Blend 3 cups fresh blueberries until smooth, add 1 1/2 cups orange juice (or cranberry, papaya or guava juice) and 2 cups plain lowfat yogurt, then pour into bar molds. Add sticks and freeze 4 hours or overnight.
2. Count falling stars
Put problems into perspective by stargazing. All you need are clear night skies, a star atlas and a red flashlight to keep your eyes adjusted to the darkness. For details, go to astronomy.com. And for upcoming astronomical events, including meteor showers, go to space.com.
3. Head for the water
Tone your upper back and shoulders with kayaking, one sport that's doable on just about any kind of water—except maybe your bathtub. You're a novice? Take a class (you'll learn more in a day than you would on your own all summer) or join a paddling club. Go to canoekayak.com for one in your area.
4. Block that sunburn
Get a broad spectrum sunscreen that blocks both UVA and UVB with an SPF of at least 30. AND for formulas you are going to apply to your face, neck, and chest, pick a product that contains antioxidants. "New research proves that antioxidants in sunscreens improve your protection against UVA rays," says Darrell Rigel, MD., a dermatologist in New York City. One we love: Shiseido Ultimate Sun Protection Lotion for Face/Body SPF 60 ($39; sephora.com)
5. Gather friends for the summer solstice.
The longest day of the year, the summer solstice, falls on Monday, June 21. Europeans call it "midsummer" because it corresponds with the halfway point in the growing season. To celebrate, host a special solstice evening picnic or your own Midsummer Night's Dream costume party.