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chrishonda nailed it with the system. This is a complex question, and answering it means developing a complete system integrating many parts. It's further complicated by individual personality - what works for me probably won't work for you. The one constant is work. If you develop your system and are willing to constantly work at it and not give up or stop, then you should see it through to it's potential. Most people start an online business, and then quickly figure out that it's not all sitting around in coffee shops and running on exotic beaches like in the adverts and requires hard work, and then promptly give up, blame someone else, and move on to the next failure. Treat this as you would any other start-up business. It all starts with a business plan, which includes market analysis, costings, researched profit forecasts and cashflow projections. This is how you build your system, and the yardstick you use to measure success. One of the easiest systems to replicate is Plug-in Profits because they create your entire Wordpress site for you and get you going with a complete autoresponder, so it's a good way to get started fast. I customised my site - EarnMoneyOnlineWith.Me - slightly by adding an Articles section, and then adding a few articles. I get these through Fiverr.com , usually 10 - 15 original articles per gig at $5 a pop. Not bad value. I give them a quick read-through to check for obvious errors and post one every second day to keep the site current. Plug-in Profits is a good way to get a feel of how running your own site works. How to post to your site and customise it. How an autoresponder works, and how to manage your mailing list. At the end of the day this is the most important. I'm sure you've heard 'the money's in the list' - it's true. You need to own your own list, and you need to learn what to do with it. The training they give with the system goes a very long way towards preparing you to run your business. This type of system is a good way to find your feet. Once you've got a good idea of what's available you'll be able to work on a complete business plan and build your own system based around your own loves and passion. This is where you'll find true success. It's not a short road, and it's not smooth, but thousands of us are able to earn our money online. Good luck.
Build up your social network and use bit.ly. I have 49,000 followers so when I use bit.lu I can make a lot of money.