Prof (Dr) Amit Gupta, a business planning consultant, gave a guest lecture on how to write a successful business plan. He emphasized the importance of rigorous research, relevance, and planning from conception to commissioning. Gupta stressed that a good business plan requires candidates to define a value proposition for their product or service and conduct significant research to logically present their concept in a coherent form that proves its credibility. The discussion covered a variety of topics related to business models, marketing strategies, and frameworks like Porter's Five Forces that can help analyze opportunities.