Forward to a friend

Does anyone here know of or have any research into 'Forward to a friend' links, such as best place to put them, effectiveness, text or icon?

What are peoples general views on this?

Any response appreciated ... many thanks.


200,000 companies around the world can't be wrong.

From Australia to Zimbabwe, and everywhere in between, companies count on 
Campaign Monitor for email campaigns that drive real business results.

Get started for free