Barely ever worth it, unless you can link exchange with an authoritative site that ranks very well for keywords in your niche.
thank you, this is a very helpful reply. Anyway, I find most of their website don't have the exchange link part, are they hide in some where difficult to find manually?
Go with off-page optimization techniques like social bookmarking, forum posting, two-way link exchange...
Well you can check other sites relevancy, backlinks and PR and then you should approach them for link exchange. Its a good practice for getting backlinks.
high quality link exchange , had better to be relative sites , high pr and pagerank , no more outlinks , anchor text similar with your keywords .
Quality link means is getting links from unique content and website should have good PR and less OBL.
You can get links from visitors already coming to your website. Just click the link in my sig and watch the movies on the site. If you want a free upgrade key, PM me and I'll send it.