So many online business available full/part time.You can approach for Article writting if you feel you are able to write something about any topic.Other wise you can go for online site promotion kind of task too.
It totally depends upon you that what you are up to. If you want to do online business you might be having some concept in your mind. Just put that concept as a question in any business forum related to your work. You will get thousand of answers for the same and then you can take the conclusion and find out the result.
There are many types of online business on the internet. Such as forex, PPC , binary options etc. Which one you opt for your investment. after deciding this you can get the view of which is the best online business
I suggest any business which you are comfortable in providing satisfied service or genuine products to your customers. Or simply become reseller or affiliate and refer others product on your website and incentive on any sales made.
If its a new start for you I will suggest you must go to a freelancer website register there and start content writing or some data entry projects the slightly switch to SEO but before starting seo work you must read about it. You must have the complete knowledge of on page and off page techniques. Without it you can't do anything with ease.
The first thing we have to understand the boundary and need of our business then we can decide which technique is best suited for our business but I explore some techniques that I know and the techniques are social media marketing, email marketing, PPC/CPC and if we promote our business website for the first time these techniques are very cheap and less risky.
I will say affiliate marketing is the best online business in the present time. It's simple just selling products on behalf of someone else. There are a number of websites offering you to sign up freely and become an affiliate.