From 2008.igem.org

Simply copy and paste the template below onto the bottom of your page, changing the "Previous" and "Next" sections to the last word of the link to the previous and next pages (so for 3 pages Team:Imperial_College/A, Team:Imperial_College/B and Team:Imperial_College/C on page B you'd swap "Previous" with "A" and "Next" with "C"). Confusing, but obvious once you get it. [:

Oh, and if a page has no pages before or after it (say), then reference the page back to itself. So the homepage's bar looks like: {{Imperial/EndPage|Home|Project}}, with "Home" leading nowhere.