What is a "relevant" link ?

Relevant links are links that are related to the content of your website. If you have a travel site you must exchange links with travel related websites. Sameway if you are submitting to directories you must always submit your link to travel related catagory.Your competitors won't exchange links with your sites easily, the best thing is to get linsted on directories, submit articles to article sites and directories with your links on the article and so on and so forth, plus check the backlinks of the sites that are on top of the listings in google and check what kind of sites they are getting links from.You can make blogs, yahoo groups, feeder sites etc. on the theme of your main site, add a little content there and then link your main site from the blogs etc.

My only suggestion is to Google the following search terms and contact each of the top 20 sites:

"Add a link" + "your keyword(s)"
"Add a site" + "your keyword(s)"
"Add URL" + "your keyword(s)"
"Add an URL" + "your keyword(s)"
"Submit a link" + "your keyword(s)"
"Submit a site" + "your keyword(s)"
"Submit URL" + "your keyword(s)"
"Submit an URL" + "your keyword(s)"
"Suggest a link" + "your keyword(s)"
"Suggest a site" + "your keywords(s)"
"Suggest URL" + "your keyword(s)"
"Suggest an URL" + "your keyword(s)"
"Your Region" + "Add url"
"your keywords" + "directory"
"your keywords" + "directories"
keyword reciprocal
keyword exchange
keyword add site
keyword resources
keyword links
"your industry" +add url, directories, etc...
"related sites" + your keyword
"related urls" + your keyword