Prioritizing features begins with a clear understanding of the business's strategic objectives and aligning them with user needs. I would generate a list of all possible features through brainstorming based on these business goals and user requirements, and then prioritize them using a scoring system like the RICE model, which considers reach, impact, confidence, and effort. This approach helps rank features according to their anticipated benefits in relation to their costs. After identifying the key features, I would create detailed user stories for each one. These user stories should provide context and clarify the value that each feature is intended to deliver to the user. I make sure that every user story adheres to the INVEST criteria – Independent, Negotiable, Valuable, Estimable, Small, and Testable. Additionally, it's crucial to include acceptance criteria in each user story to specify when a feature is considered complete and meets the necessary requirements.