Sign up on vanig.io and verify your email to access your dashboard.
Click on airdrop menu link to see a list of tasks to be completed and submit your details. You'll get $15 for each task.
You can get an additional bonus of $15 (Tier 2) if you complete all tasks ($8 in Tier 3).
You have to also go to Bitcointalk and submit your proof of entries. There are instructions there on how to submit your post.