This method is easy as compared to other methods because an individual is just supposed to comment about other blogs using his/her url. Once the comment is approved, you receive a back-link from the blog. If the page ranking of the blog is high, the quality will be high.
When you make guest post, it is easy to build high quality back-links. You will only have to look for High quality PR blogs which accept your guest post. If the blog has high popularity, you will in turn receive huge traffic because blogs like those have many loyal readers. The blog post you are submitting to blog administration should have more than 500 words to increase chances of acceptance of the guest post. Besides, you should have a keyword density of between 3 to 6%. The blog post should also be free from grammatical errors.
Use of social media is also critical in getting back-links because social media networking sites have high page rank. Therefore, articles with great social media exposure will always have maximum chance of appearing in search engines’ top result. When you publish new articles, login to various social networking sites share the articles.
By the way if you are interested in Guest Posting I have another websites that you can post an article as long as the article is original content and is related to online marketing