Looking for guarantees where none exist. No matter how good a system sounds or how much money someone claims you can make they cannot guarantee you anything. You will have to find a system that you feel you can keep up with, but your own spin on, and then scale.
There is no 1 2 3 step guaranteed approach to making money on the internet. I say this because every time I go into the WSO board I see people are looking for this. I used to be the same way and all I did was lost money.