Affiliate Marketing Secrets

I am a student of English in a university here, Indonesia, East java. I am in the last semester now. I have been doing an online business since i was in the second semester, about three years ago, but I never got money, but I never give up. I always learn.
Now i am doing online selling: selling two kings of local product and become an amazon affiliate. I have made money from the local products, but so little, Not enough just to pay my internet connection.
Some of my friends invite me to join investment program as like JustBeenPaid, but I have already registered in 2011, i just remembered it several weeks ago and have lost $10 bonus.
Therefore, i try to find other free businesses to earn money, and plan to invest.
Any some of you have suggestions for me?

How does establishing an internet connection usually work, not just in the U.S. but around the world?
I’m currently studying in China, in the previous year, I was able to simply connect a cable from the internet port in the wall to my laptop. After that I would have to enter an account name and password, PPPOE.
Which makes me wonder about what a router actually does. The place I’m currently living in has just been built, the major internet line hasn’t been set up yet. I’m curious as to how I would go about setting up the connection.
Previously it seemed I had to buy these cards w/ the account name and pass from specialty stores, the cards were affiliated with the school. As the “dorm” i’m currently living in has no affiliation with the school it seems I have to go register something…not too sure on the details.
So, what does a router? Would I need one? Where does that “internet port” in the wall actually lead o.0?