Hmmm. Can't really mention any websites. Try searching daniweb for adsense and YPN strategies. Other than that, your best bet is probably to just use Google.

For some good tips, check out the official AdSense blog on Google's site Or, if you have any specific questions, post them here and we'll help you out.

We just have a non-site specific policy around here because otherwise your thread would just be an invitation for everyone with a webmaster-related site to spam

Read everything you can written by the infamous JenStar aka Jensense. She is the recognized leading expert in the contextual advertising arena. Look for her posts in various forums and blogs.