Bounty hunting is the common thing to do in order to earn. You can visit this section of the forum for bounties,
https://bitcointalk.org/index.php?board=52.0https://bitcointalk.org/index.php?board=238.0There you can have a good start but mind you that there are so many scam and it would likely pay you in your work. However, if you are lucky to join a good project then you can earn. The scheme is like work and luck scheme to earn big. You need to work but you also need luck.