How to get rid of the sunk cost constraints:

1⃣ Once the sunk cost is formed, it is necessary to admit the reality, stop the loss in time, admit the loss, do not dwell on the past, and immediately change the track to work in other directions to avoid causing greater losses.

2⃣ Be cautious before making a decision, and make a comprehensive assessment of the possible gains and losses when you have enough information, so as to make the best decision to reduce the maximum possibility of loss.

3⃣ An important reason why many people are entangled in "sunk costs" is that they are unwilling to give up their previous investments, which leads to the inability to ensure a clear head when making decisions. So, in this case, learn to look at your own problems from a different perspective and ask yourself what you would do if you were a bystander, so as to get rid of the sunk cost constraints.