How do you present yourself on social media in order to do social selling? How do you leverage your social presence as a salesperson?

"Sales professionals, and really every professional, need to understand that their LinkedIn profile is not their online resume. They simply need to take themselves out of that frame of mind. Your LinkedIn page is really your online brand, your professional profile. So salespeople need to use their LinkedIn accounts as a resource, and not a resume. Internally at LinkedIn, we call that 'Resume to Reputation.' It’s really about the transformation in how you use your online persona, building your reputation and becoming that brand that draws people in. This is where marketing can come in, too. If a salesperson is consistently posting great content about the industry, provided by the marketing team, it will be so much easier for that salesperson to build that personal brand and that social media credibility. That’s really what social selling is all about: Giving salespeople the tools they need to have genuine interactions on social media that help them in their sales processes.

Through Sharing , sending & posting links via social media I make my presence updated & strong.

As in many case, I agree with mr. Vrindavan. Indeed your participation in social media should exceed posting a resume. You should strengthen your presence by actively posting input that is relevant and related to your industry. 

sometimes it requires a lot of talking and presence too. but the most important thing is when you are honest and sincere about what you do then a trial will convince your audience.

you will only need to struggle at the beginning but along the line people will come and patronize you once they believe you.

I do not work on social medias, but as per my experience of marketing I do favor Mr. Krishna & Hashmi

You need to maintain great level of discipline while communicating on social media network and share relevant information and be honest as if you are making a professional presentation in client's chamber.