Some blogger communities always challenge their members every month (or every year). The challenge given is usually in the form of a 30-Day-Challenge with a predetermined theme from the community administrator. It can also be a book review that must be read every day. For me personally, I like to take part in the challenge because it is very helpful to fill my blog, which is sometimes confused about what to write. I think these challenges are good and useful, because they can be used for sharing fellow bloggers. Sometimes I like to read posts from other bloggers, and so be inspired to try new products or read books with certain titles. Which was only intended to fill the blog, who knows it would be very useful like that right?