Dealing with missed opportunities is part of the learning curve in trading. It's important to take every setup you see when you're starting out to gain experience. Whether a trade works out or not, it adds to your knowledge base. If you pass on a setup and it works, it becomes another data point in your experience, helping you make better decisions in the future. Over time, you'll start to recognize patterns and setups that remind you of past trades, which can guide your decision-making process.