If you are Good at Writing and want to earn some money then go to the sites like ODesk, ELance and Freelancer and go after article and blog writing projects. Depending on what you want to work for, you can potentially obtain several long-term jobs and accumulate quite a bit of work over time.
Additionally, I would recommend that you start a blog on something that you know well. Write good entries and build back links to drive traffic and engagement. you can then begin an AdSense program, or put affiliate links on your blog to generate a passive income.
You may also want to create a website (if you don’t already have one), this can go in conjunction with your blog.
Advertise/SEO the site and acquire writing clients this way.
And of course, you can go into the content creation forum(s) and find work on this site too.
Hope this helps.If you have any other question feel free to comment below!