Use the Revel command line tool to create an empty project in your GOPATH and run it:

$ cd $GOPATH

$ revel new myapp
~ revel!
Your application is ready:

You can run it with:
    revel run myapp

$ revel run myapp
~ revel!
2012/09/27 17:01:54 run.go:41: Running myapp (myapp) in dev mode
2012/09/27 17:01:54 harness.go:112: Listening on :9000

Open your browser to http://localhost:9000/ to see a notification that your app is ready.

Your Application Is Ready

The generated project structure is described here.

Next: Learn how Revel handles requests.