I believe there is no such technique used in bitcoin earning. You need to have skills, so that with that you can do freelance jobs and earn. Other thing for traditional you need to know about strategies of increase and decrease. No techniques gonna profit you.
Right.. Not every method of earning bitcoins needs technique of some kind, but if someone has some techniques and skills then he probably can earn more then usual.
For example if someone is using signature campaign and also knows programming or designing so he can do the both things together to earn more bitcoins in a shorter period of time.