To answer your question - none whatsoever.
I treat my blog more as a hobby and an extension of my desire to help people. My plans for my blog are simple - I'm going to write for a year and improve my skill at writing and sharing ideas and information. Then once I have a shedload of original content I'll buy my domain name and spread out from there. If I make a little money on the side then that will be wonderful. But at the moment, I'm just using the blog to beta-test a future occupation that may work for me.
By the way, I'm 17 so I don't expect great things of myself. But I do think starting this young will allow me to quickly develop the necessary skills and competence to deal with such a job.