1. Invest in 8-10 names . Lesser the better. No less than say 4. Otherwise it is not possible to be on top of the companies nd have any sort of informational advanatage 2. Invest in great companies at a fair price. Great quality business. Competitive adavantage/moat. ROE/ROCE is good Growth (past) and future long runway with growth visibility 3. Valuation: First do Business Analysis . Understand various levers which will affect the business. Then valuation can be just a quick mota -mota thing. Like for eg. seeing a person from distance, u can say a person is fat. U don't have to know his weight. Similarly, valuation can be a back of the envelope thing, once u do the business analysis appropriately. Think of bull, bear, base scenarios.