Register on wulet.io (rewards will be sent to this account). To access registration page, click on the small person image on top right area of the page and then click on the signup tab to register.
Once you are done creating your account, visit airdrop website. There's a list of tasks with instructions. Complete as many as you want in order to get tokens. Basic tasks (Telegram, Twitter, Facebook, Reddit) will give you 20 WU (worth ~$15). When submitting tasks use the same email you registered with on their website. For referral email you can use email@example.com.
Remember that you have to verify your email for website registration and once you log in click on "Withdraw tokens" menu link to submit your ETH address.