You should already have your free DJ Hero and Guitar Hero: Warriors of Rock downloadable content. But how about something for Rock Band 3? Sure, why not!
This one involves leaving the house, so put on some pants. This Friday is apparently "Record Store Day." What's a record store? You know, it's kind of like The Pirate Bay but you actually pay for physical copies of things there, and the clerks talk shit about your purchase choices behind your back.
Anyhow… the point: Harmonix and MTV Games are getting in on this as well, and visiting a local "Record Store Day" retailer will get you a free token that will allow you to download The Doors' "Roadhouse Blues" for Rock Band 3. Neat!
You can find a local participating store by visiting the official "Record Store Day" website.