Burpees are fun, high-intensity exercises that target nearly every muscle in the body. And they're easy to do! Start with a squat with your hands on the floor, then kick out your feet so you end up in push-up position. Hop back into a squat, and then jump as high as you can and start again. Do 10 as fast as you can, and you'll feel the burn! Burpees are also endlessly variable. You can incorporate a push-up or, if you're feeling extra-ambitious, do them under a pull-up bar. When you leap, grab the bar and do a pull-up or two. Your body will be revving in no time!

More exercises to keep you trim and terrific...

• Get More From Your Workouts
• Add a Mini-Workout to Your Workday…and Live Longer
• Body-Balancing Workout for Pain-Free Joints
• Agility Exercises that Prevent Falling

When friends come for a stay, whether from across the state or from around the globe, make it extra special by having photos of your last visit printed. It's a great way to reconnect with old friends. You can even use an online service to have a small book printed up with a selection of the best photos from other visits. If this is their first visit, buy a photo album or have one made, fill it with photos taken during their visit and send it to them after they're back home. Then when you call to catch up in a few months, you can reminisce about all the fun you had!

More tips on finding and impressing friends wherever you go...

• Expanding Your Circle of Friends
• Wines That Will Impress Your Friends and Cost Less Than $15 a Bottle
• Good Relationships, Surprisingly Good for Your Health

Sure, a firm handshake makes a good impression. But to make a really good impression, do this: When you clasp the other person's hand, very gently touch your forefinger to his or her wrist. Aim for the spot on the underside of the wrist where you would take a pulse. Gently touching this very sensitive spot fosters a feeling of warmth and closeness. Your light contact might not even be consciously noticed by the other person—but he'll know he likes you! 

More on how to make a great first impression…

• How to Get a Yes From Anyone…Fast
• Dr. Taibi Kahler's Secret to Making a Great First Impression
• How to Get Anyone to Like You in Two Minutes or Less

Forcing yourself to smile may sound silly, but plenty of research shows that it can help you feel happier and short-circuit the stress response. So the next time you're feeling down or frustrated, make yourself smile for one minute— yes, a full 60 seconds. You have nothing to lose but a bad mood. You might even try practicing right now!

More on getting into a good mood...

• Happy at Last
• Bouncing Back from a Bad Mood
• Mood Changer
• Reduce Stress: Secrets to Staying Calm in a High-Stress World
• One-Word Secret to Happy Marriage