Rather than any single piece of music, this week I'm recommending that you give a whole genre a try, light music. It's hard to pin it down exactly, but essentially it's quite jolly, jaunty music, on the easy listening side of classical - think the theme tune to Desert Island Discs (By the Sleepy Lagoon by one of the kings of light music, Eric Coates). It's perfect for a Friday.
Go here to download free one of the most famous pieces of light music, Jumping Bean, by another of its leading lights, Robert Farnon. Or you can also listen to Brian Kay's Light Programme every Thursday afternoon on BBC3 or for a week after on its Listen Again player.