I'm not a LL owner but I'll give you a hint
"Think Google"... keep your sites simple and try to "arrange" them - ie make them as readable and browseable as possible. Don't try to spam the pages with ads... Let the surfers choose if they want to click on your ads or not - they see them, you can be sure about this... If people like your site's content they will click on the ads for sure!
-- Andrew