1: Lam's Test for leaving a job
Assume you have a fulfilling volunteer life and you are connected in the community you are a resident of (which is not true for most in corporate America — yes, think of the film Fight Club). This is so that you have a scientific control baseline to compare against your test baseline.
It is time to leave your job if your volunteer life unironically fulfills more of your own professional goals and gives you legitimate professional skills than your actual day job.