Don't let anyone access you at "zero cost." Your time, energy, attention, and emotions are scarce resources. If others can occupy you without any price, you will be constantly drained and ultimately lose control over your life. Learn to set boundaries; allowing others to approach you requires a certain "cost," such as respect, sincerity, value exchange, or scheduling. This not only filters out those who drain you but also preserves resources for truly important people and things, thereby enhancing your life quality and focus.