Write about thinks that you are passionate about and have knowledge about. Make this into a hobby of creativity and not a second job that you already start hating. Write for the joy of it, and passion, and to help others learn. Write reviews for better knowledge of a product that you enjoy. If you do this, then you will enjoy doing it, and you can do it over a span of time and then the income will come in.
Also it depends on what facts and items are buzzing that month or week, how many views and all that you get, yeah sure. But I still say without passion, knowledge, and true dedication, you won't make anything off of this.
Also, just like everything else you do in life, if you want people to see it, appreciate it, you have to spread the word. Get it out there, get traffic.