In this article, I'll guide you in outsourcing your articles using freelancing sites. Here are the things that you need to do:

1. First, choose freelancing site where you would post your project to. Today, there are about hundreds of freelancing sites in the online arena. Research and identify the top 10 sites based on their reliability and popularity. Read their terms of service. Go with those ones that charge less and those who has several service providers.

2. Post a project. In order to attract more bids, I recommend that you make your project as descriptive as possible. Indicate how many articles you need and the required word count. Also, indicate the topics, the required keyword density, and how much you're willing to pay for each article.

3. Review the bids. I suggest that you check the project that you've posted after 24 hours. By this time, you'll surely get several bids from ghostwriters who are coming from all points of the globe. Review each bid and consider the feedback of each freelancers. Of course, you would want to go with those people who have proven track record and who were highly recommended by their previous customers.

4. Shortlist at least 1-2 ghostwriters and make time to interview them. Verify skills and ask about their turn around time. It's also great if you can ask about their policy about revision requests.

5. Communicate with the winning bidders. Choose the best bidder based on their qualifications and writing skill level. Send them the keywords that you would like to target. Encourage them to email you should they have questions.