One of the best ways to earn quality tokens is to participate in bounties!
Airdrop time is already passed! Nowadays almost all airdrops are crap. You need to select a good project/ICO and put some time to share it in social media and earn some rewards for your work.
For example: AELF, a top 100 token has an awesome candy platform that reward you for doing some tasks.
You can take a look at my article about it here: https://steemit.com/cryptocurrency/@correia/best-airdrop-s-or-aelf-elf