SEO ranking factors

There are several factors affecting in top 10 rankings. Few of them are:

1. Keywords selection and their competition
2. External links point to your website and internal pages
3. Indexing in search engines
4. How often your content being refresh
5. Searched keywords relevancy
6. Keywords rich original content
7. Clean code
8. Depth of internal linking
9. Internal cross linking
10. No black hat tactics

And more.

Related SEO Question:

Do you give any guarantee in top 10 rankings?
When I expect top 10 rankings?