If you have the expertise or a passion or interest for a subject, you're ready to start making money with a blog. With a service like Blogger (www.blogger.com), you can start up your blog totally free. You can also create your own site and secure your own hosting for a low price, which is generally the route I recommend, as many free blogging sites have restrictions on what you can say or do, including making money or advertising.
The internet changes so fast that one year online equals about five years in the real world. But the principles of how to start and grow a successful online business haven't changed at all. If you're just starting a small business online, stick to this sequence. If you've been online awhile, do a quick review and see if there's a step you're neglecting, or never got around to doing in the first place. You can't go wrong with the basics.