The first thing to remember for maximizing Adsense income is to have good content on your websites. Make sure you read the Adsense Checklist at:
Next, drive tragetted traffic to your site. If more people visit your sites, your income will get a boost automatically. For more details, go to:
Remember, do not ask your website visitors to click on the ads on your site. This is against the Google Adsense Terms of Service. For a list of DOs and DONTs, visit:
Important Do's and Don'ts for Adsense Professionals
Prepare a website with good content, increase traffic to your site through proper means and follow the adsense rules and regulations and cash in on a regular life long income.