Top 3 reliable and trusted websites where you can start doing online job.
Odesk
-This is popular and trusted online job site. Like the typical one, Odesk allows you to post or find a job. One of Odesk requirements is you need to take and pass Odesk readiness exam. Examination was made in order for you to understand how the site works. This is very important so that you will be familiarized the system regarding payments, bids, do's and don'ts, and other necessary matters in their website.

HAVING PROBLEM WITH ODESK EXAMS?
ADD me @ Facebook and I am very much willing to help you. rex.pisan2010@gmail.com
Freelancer
-I just remembered my friend asking me about freelancer. She said.
" Rex Pis-an wui help me sa freelancer bi., d q balo saon ni?? ahehehe., mag post q ug project or mo bid q? lol :D online nya., chat tah., hehe., ty ;) "
Before I will answer her question, I will just chit-chat a little bit about freelancer's characteristics. For me, this is the easiest. Why? Because freelancer doesn't have examination. HEHEHE I hate exams, I don't want to remember my terror years of schooling hehehe. Back to the topic, freelancer provides more category than the others and they have user friendly working environment (website features). The only disadvantage of freelancer is the more provider in a site the higher competition it would be. The result would be less chanced for you to get hired.
About her question, as a provider(job seeker), you need to bid for a project. Posting a project is only for the client/person who will hire you.
The third and the last one is my favorite.
Elance
Real Clients
- For all the sites that I have tested, Elance clients are responsive and active. I have noticed that the clients are so quick in disseminating the project to the provider. You will really know that they are exist to give you a job not just to fool around. Maybe because scammers cant do anything with ESCROW.
ESCROW
Elance Escrow is a safe and efficient way to pay for work delivered online. Once a job is awarded, the client and contractor define and agree upon milestones, and funds are then placed into Escrow. Contractors can quickly and safely begin working knowing that payment is secure and will be released once work is completed, and clients are protected knowing their funds are securely held in Escrow and will only be released to the contractor when work is delivered and accepted.
source: http://help.elance.com/forums/30972/entries/34480
I can testify that it is real. From my own experience.
Like Odesk you need to take exam in order for you to start working at Elance.
Start working at Elance: Click HERE (Recommended)
HAVING PROBLEM WITH ELANCE EXAMS?
ADD me @ Facebook and I am very much willing to help you. rex.pisan2010@gmail.com
Next time I will be posting about:
Elance Step by step tutorial