NFT wallet development involves several key steps. Firstly, grasp the concept of NFTs as unique digital assets. Then, choose the blockchain platform, such as Ethereum, and select appropriate development tools like Web3.js. Incorporate essential features like wallet creation, NFT balance tracking, and marketplace integration while prioritizing security with measures like secure key storage. Design an intuitive user interface, thoroughly test the wallet for functionality and security, and ensure compliance with relevant regulations. Engage with the NFT and crypto communities for feedback and promotion. Finally, launch the wallet, provide regular updates, and maintain its performance and security.