Do translations if you know other languages. I do translations (Russian/Turkish/English) and get quite well when there is work to do
For me if you want good money then be unique.. For start get a small unique product done you may need small investment here but thats work good.
It's not mandatory. Many people have started from nothing, become affiliates without paying a penny, started off with free hosted blogs, and extensive free article marketing, and eventually built it up to a full-time living with absolutely no advertising at all. They have effectively substituted their energy/time/effort for spending money, and all they actually needed to start earning money was an internet connection.
a good way to make money is to teach people how to spell, would you like a lesson lol? jk write articles lol
Why try finding one way to make money? I found 20 ways to make money online, without paying a dime. I wrote a hub about it on hubpages.com, Check it out at hubpages.com/20-ways-to-make-money-online
Exploit the biggest market on youtube: sex. While not porn, it is suggestive sex, and that is even more profitable.
I say site flipping would be a good start. Find a good niche, set up affiliate products on your website, promote through many methods found here, get a tiny bit of sale and sell the site for a tiny profit. Scale and get bigger.
Article writing if your good in it and another things is blogging . Because there are so many ways to monetized your blogs which can help you in making so money