Is your content unique? Are your sites base on high profitable niches? Are you getting decent traffic in terms of unique visitors per day? do you need more promotion? Ask yourself the above questions and act accordingly
You need to write unique and relevant contents firstly. Make your website different in style and give some thing new to Google. only then Google will offer you something.This is the best idea for your Google Adsense.
Agree. I would say unique posts would be the best way to gain more traffic and make more money from AdSense.