There are many reasons why we have "meditation" in the number spot on our Eight Branches of Oriental Medicine. Here is an article from New Scientist that offer one reason of many to incorporate some meditation in our daily lives.
"Meditating does more than just feel good and calm you down, it makes you perform better – and alters the structure of your brain, researchers have found.
Follow this link to get the rest of the story: http://www.newscientist.com/article.ns?id=dn8317