There are also several similar ways to make money online...You can either:

* Set up your own website/blog/forum to earn revenue from advertisements (check out Google Adsense)

* Set up your own website/blog/forum to sell your own products and/or others' product (google "affiliate marketing" for more details)

* Joining programs like Paid To Click, Paid To Post and other Get Paid To programs. They require only your time but will pay considerably lower than the other ways

* Forex (foreign currency exchange). Require a LOT of financial know how and a considerable amount of starting money but is very profitable if can be done right.

* Reselling-can resell domain names,hosting plans,SEO services,Website designing service,other domain and web related tools and get commissions

I personally prefer reselling business.By being a reseller you can sell the products or services of some others and get commissions from them and make money online..I am involved in this reseller business for more than a couple of years.I have got reseller account from http://www.goresellers.com and have earned quite a good sum of amount.I am doing this as a side line business