Anyone ever woken up one day and realized they've been in a boiling pot and everything has to change?

I realized today I can't tolerate another moment of my life the way it is. I absolutely despise my job and my current employer is a dead end. They don't listen to any of my ideas and have been doing things the same way for decades and refuse to join this century. I've got a bunch of debt thanks to school and credit card debt from emergencies. I'm just surviving.

It feels like things are just bad but I was trudging through the days "waiting for a better job market" until today when I just got this overwhelming feeling that enough is enough. I don't know how I worked so hard solely to achieve this feeling of suffocation and unhappiness. So I decided to start applying for new jobs today and they'd all pay more than my current one. No more waiting. I simply cannot stand the idea of still being stuck where I am in a month or two without trying.

This was partially a vent but also a legitimate question. Has anyone else just woken up and simply had enough with the ways things are and decided to go out and change them? How did you harness that motivation and how did things turn out for you?