To participate in Arbitrum's new airdrop, you need to meet certain criteria like having previously interacted with Arbitrum networks or held specific tokens. To maximize benefits, engage actively on Arbitrum by using its dApps and bridging assets. Stay updated via official channels and join their community for early information. Combining multiple qualifying activities increases your chances of receiving a larger airdrop. Also, consider staking or holding tokens related to Arbitrum to potentially earn additional rewards.