“A previous entries” link at the bottom of the page?

How do I go about adding a “<< Previous Entries” type link at the bottom of my page? After the alloted allowed number of posts per page has been breached… the only way for users to find old posts is to click on the “categories” section on the upper right hand corner of the page to browse through them… I’d much rather just have a link at the bottom that would allow users to access older posts.

BTW, the site is http://www.xboxoutpost.com

Thanks in Advance