Blog and Mixi

I do not know much about difference between Blog and Mixi, but seeing my friends using both community well, it may be good for me to make use of both Blog and Mixi. Since it is easier for everybody to see Blog, it may be better to write in English on my Blog in order to show my Blog to many people including people from foreign country. So I begin Mixi in Japanese, and I'm planning to write what I thought in my daily life from the Engligh point of view in this Blog.