Heyo. My thoughts:
1) Mining/Staking/Masternodes
2) Airdrops/Bounties
3) Shorting w/ leverage
4) Arbitrage
5)...
6) MacDonalds
Anything else?
For me in this blood bath i will normally go with bounty and airdrop, I don't really know much about other methods of earning so I will always go with the one i am already familiar with, with is bounty.