I have seen many bloggers don't read adsense policies before applying for it. They without reading those policies apply of the adsense programs and later when they break those policies they get banned form adsense. But they don't know why they got banned. So I am listing here some basic google adsense policies your must know before you apply for it. So lets start.
Your blog should not contain porn, illegal or gambling contents. And it also must not contains more ads than content. Google doesnot want their advertisers complaining to them that their ads are shown on such sites or blogs. So try to build up the blog that advertisers mostly like, means containing fresh and unique content, simple and nice designs and no illegal or porn contents.
Google doesnot allow to modify the adsense code that they provide to you. Yes, you can change the colors and font of the adsense ads from your adsense account. So there is no need to modify the adsense code and get banned form Google.
I have seen most new bloggers in hope of earning lots of Dollars they use different software or click their own ads. It is true you will get some easy cash by such clicks bu it google knows it then surely you will get banned. And for your kind information google is very much clever that us. So don't try to cheat google.
After ads starts to appear on your blog, then leave it alone. Don't encourage your users to click on the ads. Like adding "click here" or "support us by clicking" words on adsense ads are not allowed. Google doesnot like it.
Try This : Adsense Code Parser Tool