This is the major issue commonly faced by site owners.
World wide web is a very dynamic environment for every single topic there are approx 1000 results shown on google. So it is very important that if you are getting a visit then it should be fruitful and fulfill your motto. As the competition is increasing perfection is also increasing now online marketers are more aware on how users response on a topic.
To keep the interest of a visitor in your blog try to use simple English, Try to give a storyline to your words. Try to write in short paragraphs with interesting and relevant images. Try to use some funny quotes to keep the charm and for a short break, try to give live examples to which every one is aware of.
The most important thing highlight the important words or phrases in your blog.