A blog is a simple but powerful tool which all marketers and businesses should be utilising to explode their sales, build credibility and improve customer retention. I've been doing a lot of research with regards to blogging and came across a case of a 19 year old kid who was making something ridiculous like $50,000 a year with a blog on mobile phones, from his bedroom! This is an extraordinary case but clearly there is a good earning potential through blogs, however they do take time to grow .