1. Create more content pages on your site and have Goggle AdSense banner on all of these pages.
2. Whenever possible, use higher paying keywords.
3. Create new page and optimise it to target high paying keywords
4. Get more qualified traffic to your site. The more qualified visitors to your site, more people will naturally click on the displayed ads and of course you wil learn more.
5. Create pages to fit specific purpose. Create page that optimise customer experience for selling product online, create some pages to lead customer to your site by targeting high search engine traffic keywords and create some pages to maximise google AdSense revenue.
6. Create high quality information pages.
7. Choose the best format to display your Google Ads.
8. Lastly Dont Cheat. Dont not click on your own ads, and don't out smart Google team.