Tired of optimizing my blog but still couldn't rank

Hello BHW members!

Direct on the topic, i am working for a keyword that has about 800 monthly searches and is quite easy to rank because the pages that have dominated the google SERP have hardly 50% unique content and 2 or 3 backlinks from web 2.0

What i tried for my web page is, first i wrote about 800 words article(most website on first page have 400-500 words; few of them have 1000). I have put some images and embedded a video. I have done proper interlinking to other pages of my website. Additionally, i have created about 5 backlinks, some of which are from web 2.0 and others from forum. i have increased the social sharing of the page as well.

I still cannot figure out why i am unable to rank. I didn't notice any changes since 2 months. Whenever i make backlink, it gets indexed after few days(found it on Webmaster tools) but there is no change in keyword's position. any help?

Source: Tired of optimizing my blog but still couldn't rank