In a lecture at the University of Florida, Buffett shared a simple yet powerful philosophy: “We never look back. We just figure there is so much to look forward to that there is no sense thinking of what we might have done. It just doesn’t make any difference. You can only live life forward.”This forward-looking mindset, coupled with a disciplined approach to decision-making, lies at the heart of Buffett’s success.Buffett emphasizes the importance of learning from mistakes but cautions against dwelling on them. “You can learn something perhaps from the mistakes, but the big thing to do is to stick with the businesses you understand,” he advises.This principle underscores the concept of the “circle of competence,” a cornerstone of Buffett’s investment strategy. By focusing on industries and businesses he understands deeply, Buffett avoids the pitfalls of venturing into unfamiliar territory.One of the most common mistakes investors make, according to Buffett, is acting on tips or recommendations without doing their own due diligence.“If there is a generic mistake outside your circle of competence, like buying something that somebody tips you on or something of the sort in an area you know nothing about, you should learn something from that—which is to stay with what you can figure out yourself,” he explains.This lesson is particularly relevant in today’s fast-paced, information-driven world, where the allure of quick gains can often overshadow rational decision-making.Buffett also stresses the importance of personal accountability in investing. “You really want your decision-making to be by looking in the mirror,” he says.Before making any investment, Buffett insists on being able to articulate a clear reason for doing so. “Saying to yourself, ‘I am buying 100 shares of General Motors at $55 because…’ It is your responsibility if you are buying it. There’s gotta be a reason, and if you can’t state the reason, you shouldn’t buy it.”Whether it’s a tip from a cocktail party or a chart that looks promising, superficial reasons are never enough. “It has to be a reason to buy the business,” he asserts.This disciplined approach, rooted in the teachings of his mentor Ben Graham, has guided Buffett throughout his career. By focusing on what he knows, avoiding distractions, and taking full responsibility for his decisions, Buffett has built one of the most successful investment track records in history.His advice serves as a timeless reminder: in investing, as in life, the key to success lies in looking forward, staying within your circle of competence, and making decisions you can confidently stand behind.You can read a transcript of the lecture here: Warren Buffett Lecture – University of FloridaMore By This Author:Costco Wholesale Corp (COST) DCF Valuation: Is The Stock Undervalued?ORCL: One Stock That Superinvestors Are Dumping – Is It Time To Sell? V: One Stock Superinvestors Are Loading Up On