Your content marketing efforts will bring in links, but those will be a little
slow to come. It's also a good idea to build links manually to your store as
well. You will achieve some of this using guest posting, but you don't want
the only links to your site being guest posts.
Good ways to build links are relevant directories and resource pages, and
snooping around for broken links to similar content and emailing the websites
owner to link to your content instead.
It’s 2014, and many people will be aghast at my mention of link building.
The truth is, as an ecommerce store, you will have to do some measure of it -
otherwise your SEO will fall behind.
Like everything else, though, too much of a good thing is bad, so don’t
overkill.
There are plenty of free tools available to do all of this.
Quick Tip: Only build links from relevant pages - if you sell skateboards,
don't get a link from a ballet website!
50 ways to build links to an online store - by yours truly
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One of the most comprehensive lists of link building strategies on the web
A great resource put together by Brian Dean about link building