If you like download the ETHD wallet and get your address or use an exchange to get a ETHD address. Then send the dev a pm on here saying you would like to join the airdrop along with your ETHD address. That is it and if you like spread the word about ETHD. Please note that your coins will take a couple of days because the dev has over 500 messages, you will receive your coins but it will take a while.