Web Workers Best Practice

Web workers are a cool new part of HTML 5. They allow background processing in Javascript in the browser which has not been possible before.

However the best methods to approach them is less than obvious. I have come up with a few things

• Functional Programming 
• Simple code
• breaking up large jobs into small parts

Any other ideas?

But really I am thinking that this needs to be out there for 2-3 years before we really figure out how to use the things.