1) Read the TOS and Programe Policy of Adsense. And follow all that very strictly. Remember it changes as well, so keep looking it as frequently as possible.
2) Don’t tell your adsense websites to anyone you know. Friends and family should never know about your adsense websites or blogs. If any friend get’s your adsense links, he may click your ads to help you, and you can get banned. Moreover if your friend turns enemy then you will sure have problems.
3) Don’t make enemies online . Avoid enemies on Internet, as they might give your ads a 20 click and you can get banned instantly.
5) Don't try to cheat Google’s crawlers, it knows everything. If you play honestly then it will help you more than anyone else.
6) Try to make content, rather than optimize for keywords as made for adsense websites are not tolerated by google any more.
8) Don’t edit your ads, you already get a lot of opportunities to get a desired ad format and color, there is absolutely no reason to edit your ads once you get it.
10) No porn and adult content pages allowed, so stay away from those pages.Make websites and blogs to improve the Internet, add resource and knowledge in text, so that Internet becomes a better place and not full of junks. Don’t create pages simply to make money. Ask yourself, if there is no Adsense, will you still be making these websites. Your primary reason to make websites should not be to make money from adsense. Rather Adsense should be treated as an optional feature, that makes your website better.