Hi,
I am not familiar with myblogguest.com, but I think that the basics of guest blogging apply here, too:
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the better your content, the better your chance that others will pick it up
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try to offer a new perspective, not just to rephrase what other people have said
I believe that places as myblogguest.com are also a good networking opportunity. Do not just upload your blog articles and wait for them to be found, but browse available blog articles in your niche, too, and if you find a good and interesting article, post it on your blog. You can then ask the author of the guest blog, to feature your article, too.
And if you find you have created a really exceptional piece of content, consider featuring it on your own blog instead of using it for guest blogging. You might be able to attract more quality links coming directly to you this way.