So enjoy it to your fullest, and then stop eating! It’s as simple as that.
3. Sometimes, there are emotional attachments to sunk costs. Suppose you go into a top MBA school, and 3 years later out find yourself in a decent job. But you are unhappy with it. Now you will think about all the time, energy, and costs that you invested to get the job and would far leaving it. Unfortunately, these are also termed sunk costs. So if your end goal is your happiness, I would suggest you quit your job and invest your energies in doing something that will truly make you happy.