BTW I am in the exact same position right now myself. I did not follow what I am going to suggest to you next. But I hopefully have learned my lessons and won't be here again. These lessons were learned through mistakes I made and still make.
1. Always be looking for a job.
This means you should often be checking for jobs in your career field, even if you know there is no chance you would leave. Make sure you keep in mind:
Growth or looking for your next step. Too many people go from one job to the same job elsewhere. They are passing up a great opportunity to change their direction!
What kinds of things/skills others are looking for in an employee with your skillset. Helps you keep yourself employable.
Temperature and pay of your field. Is is waxing or waning in popularity?
This also reminds you to keep your resume and profiles updated.
2. Keep in mind it can be 1-3 months to find a new job that works. So, see #1 again to keep that number at the low end. Careers outside of tech can expect much longer timeframes.
3. It is a numbers game.
There are odds that work in your favor and odds against.
Timing is probably the biggest single predictor of your happiness and pay. For example, I work in IT. If I am applying for jobs in Nov-Dec I know I am probably a backfill replacing someone who is leaving. Backfill gives you great negotiation room but are almost guaranteed to be difficult. Why difficult? Logically, there must be some reason the last guy is leaving. And you will be expected to be at least as good, and lastly you will have to quietly clean up his mess.
Timing is also almost impossible to control. So keep that in mind. See #1 again to improve those odds.
HTH.