Building the links for your site is very imp for getting good traffic and good page rank in google. Here are some simple tricks for building the liknks with out buying them..
People Love Lists & Linkbait
Get Social Bookmarking!
Blog for Links.
News and Syndication Build Fresh Links
Directories Will Help Create Links.
Network With Your Local Community.
Review Products or Businesses RSS-ify and article submission also helpes you to do this..
Also try Video submission and photo marketing