Where to start??

Where do you want to start? What works best is often to pick one method and stick with it for a while. You don't want to jump around from one thing to the next. I know from experience that sort of mentality just does not work. If you work at one method, you'll stand a much better chance. Don't jump at the next thing until you've had success (or failure) in one thing.

Whatever it is you do, you'll probably be using a mixture of things anyway. For example, if you get into blogging, you'll need to create different revenue streams for the blog. One might be AdSense; as your traffic grows, you can begin looking at other advertising services or even selling ads directly. You might also promote products as an affiliate. Or, you could create your own product and use your blog to help drive traffic to it and build relationships with your customers and potential customers.

It's largely a matter of finding what you want to do and then planning around it. If you like blogging, the option above may work for you. If you just like creating products, you might start with a simple website(s) to sell your product(s) and then build relationships with affiliates to get them to do the selling for you, so that you can concentrate on product creation rather than other things, especially if you don't enjoy those other things as much. Be aware, though, that in the beginning, you will very likely have to push for a lot of sales yourself; you'll need to build a good reputation to attract higher quality affiliates.

The bottom line is that there is no right answer. Some people will succeed in blogging, but fail in product creation. For others, it may be vice versa. Some may do better in PPC, while others may excel in article marketing. So, you have to not only find your niche but also find the method that is going to be best for you and your own style and preferences.

My personal opinion is take some time in finding and researching a mentor. I defiantly agree with what others are saying about getting a feel for what style or type of marketing you like, but if you want my honest opinion, a good mentor will teach you and show you how it works and why it works according to their particular expertise. This makes learning a lot easier than trying to read and figure things out for yourself. When I was mentored by Peter Parks aka "Affiliate Punisher" that's when things kicked into high gear for me and many others IM'ers I know. I haven't look back since!