Making money online can come in many forms which are:
Surveys
By signing up with a survey company you can fill out consumer surveys and be compensated with cash, services, goods, discounts, etc. Its as simple as it sounds the key is to find the right company to sign up with.
I personally recommend
Surveysavvy in that there is no risk and no difficulty in understanding the process it just taking surveys and receiving money.
Blogging/website
There are many domain services out there that provide cheap domains or free blog spaces. With these resources you can open up your own personal site dedicated to your interests. At the same time you came use that site to advertise and sell products or services. Google provides free blogs. So go ahead and get started today!
Affiliate Marketing
As an affiliate you can make money by earning commission from advertising/referring another persons product or service. There are many affiliate programs out there that pay commission. If you have a personal website or blog the most notable one would be Google Adsense. This service is free to sign up with and practically works for itself with the right knowledge and planning.
Chitika is also an affiliate program that can be used in conjuction with Google Adsense