Always follow the price action, do not trade just because your friend told you. Study different analysis that can help you to become a better trader. You can easily know when is the right time to enter and exit in the market.
Better understanding of what you are doing will save you some time. It's easy to choose the right position to take when you have the skills of anticipating what the market can bring to your invested assets. Many times, we've seen traders who mistakenly sell their assets and regret that they've made the wrong timing of letting their token go.
Better knowledge of the project in all factors that will lead it to move is the most important thing that you need while trying to succeed from this business.