Reciprocal linking is one of the most important things one can do to market a site, but the links you ask for (and the ones you place on your site) should be of direct use to your visitors and within general topic area of your site.
The following site has some articles on link building, but I would recommend the links I gave you above over any others. Just do a search on
http://www.ihelpyouservices.com/forums/ to get some excellent advice!
Articles on Link Building Strategies and Tactics
Good luck!
