Let's say my main keyword is "online games". How would you guys structure anchor texts for this main kw, so it's not over optimizeed and looks natural in google eyes ? What i do is i make 60% of my links with the exact anchor text (online games), the rest like "play online games" "best online games" "download online games" etc. The problem is ... some of my sites using this structure go up .. some go down!. I dunno why ?