To apply to Google AdSense is not a hard task. But to remember some of the important factors before apply to Google AdSense.

Remember that content is the king, Just create some quality content for your site.

Here is list of why the site gets denial from adsense :
1. Site under construction.
2. Not enough pages.
3. Not enough traffic.
4. Site that doesn’t comply with policy.

Try to make content that is not breaking the google adsense TOS (Term of Service).

Before  apply to Google AdSense, please make sure your website or does’t contain below mentioned related articles or images in your website or blogger, else that might set off the deny button.

• Excessive profanity
• Violence, racial intolerance, or advocate against any individual, group, or organization
• Hacking/cracking content
• Illicit drugs and drug paraphernalia Pornography, adult, or mature content
  Gambling or casino-related content
• Excessive advertising
• Any other content that promotes illegal activity or infringes on the legal rights of others
• Pop-ups, pop-unders or exit windows that interfere with site navigation, obscure Google ads, change user preferences, or are for downloads
• Other types of pop-ups, pop-unders, or exit windows may be allowed, provided that they do not exceed a combined total of 5 per user session
• Excessive, repetitive, or irrelevant keywords in the content or code of web pages
  Deceptive or manipulative content or construction to improve your site’s search engine ranking, e.g., your site’s PageRank
• Incentives (monetary or point-based) to users or third-party beneficiaries for online activity including, but not limited to, clicking on ads or links, performing searches, surfing websites, reading emails, or completing surveys
• Sales or promotion of certain weapons, such as firearms, ammunition, balisongs, butterfly knives, and brass knuckles
• Sales or promotion of beer or hard alcohol
• Sales or promotion of tobacco or tobacco-related products
• Sales or promotion of prescription drugs
• Sales or promotion of products that are replicas or imitations of designer goods

So how can I get google adsense Aproval, then? (here is simple trick)

Google AdSense Approval Process

Most of the adsense publisher apply the adsense using blogspot.com. one of the fast, cheap and most efficient way to make blog for adsense approval. Here is step by step how to do it :
1. Make a blogger,con account
2. Make one blog at blogspot.com (eg: http://something_you_like.blogspot.com)
Else Your website must be your own top-level domain (www.example.com and not http://www.example.com/mysite).
This means that you should be applying for a Google Adsense Account with your Root Domain Name and not from a Sub Folder. You can also apply from Sub Domains like blogspot.com or blog.com which offer you free blog services. Make sure that you apply from your main website and not from a new blog because a established website has more chances of application approval.

3. Fill you blog any english article, of course article that correlated with your blog title. You can find it by googleing around using google.com and then do some modification on the article, to make it unique. Try to make 3-5 blog post.

4. Then go to google adsense to register (http://www.google.com/adsense). Submit your blog address for review by google adsense team, Use your true identity don’t fake it, play with clean

5. Then wait, During waiting time, please keep updated your blog. Make a blog post at least one per day. And start promoting your blog, to get more visitor.

6. Dont forget to Check your email. Usually the mail arrive in four working days.

7. If you got Approve, then you may put the adsense code in your blog, of course keep your blog updated too. and begin to promote your blog. If you got deny move to step 8.

8. If you got deny, Please check your mail carefully,
Pay attention to the reason why your blog got rejected.
Correct all the mistakes and go back to step one.

Please also make sure that : Your site must comply with Google AdSense program policies.
There are multiple Google Adsense Policies which have to be perfectly implemented and made sure you dont break any of them. The most important of which is not posting advertisements on pages which have Illegal Content.

For any further more queries on  Google Adsense tips and approval do write let us know via comments:)