I've finally decided to phase out most of the affiliate advertisements and AdSense on my site and its subdomains. I've been basically giving away the space for the last nine years. I kept thinking that as I got bigger and with more traffic, affiliate ads would start working for me. I am going to start approaching companies I like to place ads on the site, or start leaving the ad space empty.
That being said, are there any affiliate programs that work for you? Do you do more than just place the ad in your sidebars? Do you try selling what ever the product is in other ways, like writing about them? Do you approach companies to place ads on your site, or do you wait for them to come to you?
This is probably the channel of running a site that I am least confident in managing.