well, i respect the opinion of all members here.
i think I should add more things in my above points
to rank your site without backlinks is not impossible
site can be easily ranked in google If you follow the above mentioned techniques. also take care about the following points
1. Choose the keywords with Zero or very low Competition. There are keywords that are considered with low competition. Low competition keywords, an exact match domain and well optimized content would certainly put the website on the front page of Google.
2. Select Low Search Volume Keywords. Try to find a keyword with 100 to 200 searches per month and rank for it. Here need to focus on the volume with the similar strategy of low competition keywords.
3. Focus on the quality of the content. I am a strong believer in quality content and you should be too. The most important thing to consider while trying to get rank without backlinks.
4. Try to use an old domain. If you find an old domain and use it as a niche website, you may have an even greater chance of ranking it even with no backlinks. But need to take care while the selection of domain because old domains already have backlinks or if you able to find the old domain without backlinks, keywords issue can arise.
members can add their suggestions