Welcome to WebmasterWorld Guest from 220.127.116.11
I just want to tell every one who complains how lucky you are you have AS.
What percent of your page views does that 80% generate and are you selling something on those pages that you produce yourself? Just curious.
The real key to AdSense is traffic, targeted traffic, traffic in a buying mood, and lots of it, from 1K-10K visitors a day for starters will usually generate some cash.