Whenever I felt like that, I used a mental hack to make me feel better. I would sit down and start to think (or write) about all the things I am grateful for. Coming from a third world country, it was easy to see how good it was to be highly employable and live in a relatively safe society. This would instantly put me in a good mood and make me feel proud of my achievements.

Being grateful doesn't mean you should accept your lot in life and stop striving for improvements. It will just help you make peace with where you are at right now, so you can focus on your next steps without the negative pressure.

Today I run my own business and make more money than I ever expected, and I still use this method whenever I'm having a bad day.