Work until you drop. Microsoft explicitly focuses on morale. Each group at Microsoft has a morale budget that can be used for anything the group wants to use it for. Some groups buy movie-theater style popcorn poppers. Some groups go skiing or go bowling or have a cookout.
Some groups make T-shirts.
Some groups rent a whole movie theater for a private screening of their favorite movie. When I first began consulting at Microsoft, I was pleasantly surprised to find how much time each day I could actually spend working. You just take what you need, and you don't even need to sign anything. Most other supplies are only an email message away. If you have a computer problem, you call the company's help desk and within an hour or two a knowledgeable computer technician will have fixed your problem.