The last meditation class I went to was centered on Love. Being the most powerful energy one could feel, the effect on you and your body would be, i imagine, considerable.
I wont go into the details as it is considered a highly kept secret (only known to those who paid. hehe), the basic concept is to sit down comfortable, concentrate a little while on your breathing, close your eyes, imagine the first time you saw the (current) love of your life or hugging your kids or parents or a mix of everyone you love. In the very least, imagine looking at yourself and smiling to yourself (and you smiled back).
Remember that feeling, bring it out, feel it for as long as you can.
Try for 20, 15, 10 or 5 minutes. Don't forget that slow deep breath!
Do tell if you've tried and share the experience.