Don't Give Away Your Happiness
The more we give other people and things the power to make us happy, the more we lose control over our own happiness. It's one thing to want something; it's another to need it. It's okay to want a job or a promotion, a house, or the ability to take a year off and travel. It's unhealthy to assign these things so much value that the failure to obtain them will affect our self-worth and happiness. It's okay to feel brief disappointment or a compulsion to act (to try again) when we fail to obtain these things. It's unhealthy to feel rejected or defeated. That's when we know we've given away the power.