Use heuristics to complement your BDD testing. Heuristics are rules of thumb or guidelines that can help you test more effectively and efficiently. For example, you can use the CRUD heuristic (create, read, update, delete) to test the basic functionality of a system. Consider using the FEW HICCUPPS heuristic (familiarity, explainability, world, history, image, comparable products, claims, user expectations, product, purpose, statutes) to test the consistency of a system.
Exploratory testing is a creative and dynamic testing approach that involves designing and executing tests based on your curiosity, intuition, and learning. You can use exploratory testing to discover new scenarios, test boundaries and exceptions, and find hidden bugs that BDD testing might miss.