The web is built on links, and web users routinely use links to find the information they need. When a site links to your site, web users follow those links, resulting in web traffic, or referral traffic. When these backlinks, also called inbound links, come from high quality sites, they also tell Google your content is authoritative and trustworthy. This is important because inbound links from respected sites are an SEO ranking factor, so they can boost organic traffic, too.
When it comes to traffic for sales or leads it varies from industry to industry and country to country, on the top of that it requires other complex process that are suitable only for the advanced paid traffic masters. In this article I will be discussing traffic for branding and improving rank on several web metrics which are responsible for judging the quality of a website such as Alexa rank, Similarweb Rank, Domain Rating, WOT Rank and so on.
Creating content with a baked-in incentive for thought leaders to share it like thought leader “round up” posts (Richard Marriott from Clambr has a great free in-depth guide on the subject here: http://www.clambr.com/expert-roundups/), best of lists, lists of tips and resources where you’re linking to and citing other folks’ content (which gives them an incentive to share)
Shane Farrell is the “been there, done that” guy in the IM space. From SEO to Amazon and plenty in between, he eventually settled on list building and never looked back. Also a successful solo ad vendor and partner in one of the largest SMS companies back in the day, he’s since turned to sharing his personal techniques for list building by releasing quality products that have been smash hits in the market. Also a successful coach, Shane’s reputation for integrity is second to none.  

When we see a sharp decline in traffic, we first check the site’s code. During site changes and redesigns, SSL and 301 redirects are often overlooked, causing Google to de-index the site's pages and search rankings to drop. The drop in rankings can dramatically decrease visitors. So when building a new site or making changes to your current one, double-check your redirects before pushing live. - Michael Weinhouse, Logical Position
Set up a blog. These are a very good method for getting traffic to your site and they are free. You can start one at one of many free blog sites. Then you set up a feed for content and then go to other blogs with the same topics or fields of interests and read and comment on their articles. As well a lot allow you to post your article which gives you more traffic.
I find it interesting that you talked about nutrition supplements for athletes. I am very close to launching such a product for enhancing aerobic exercise performance in women (ie. improved times in a 3 mile run).. The product contains no stimulants or exotic herbs. In fact three of the five ingredients are well known minerals, but in forms not found in most multi-vitamin-mineral supplements. The research behind the product comes from me. The credibility behind the research is that I am a professor of human nutrition with over 100 research papers. Now, the trick will be to use my connections and credibility in a business savvy way.

1. Participate and showcase your website in every social media platform. But it should not be restricted to just creating a page, you should create a healthy relations with your customers. Make them sense that you care for their time. Creating special video or audio tutorials can create this impression. Share creative and useful content on all of your pages. Reply to their queries as soon as possible. Add social network bottoms on your website, preferably at the end of every post.

Too much web traffic can dramatically slow down or prevent all access to a website. This is caused by more file requests going to the server than it can handle and may be an intentional attack on the site or simply caused by over-popularity. Large-scale websites with numerous servers can often cope with the traffic required, and it is more likely that smaller services are affected by traffic overload. Sudden traffic load may also hang your server or may result in a shutdown of your services.
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