Over the years, there are a few educational courses I've built. The best one is called "Getting Better Clients." You can sign up for it below.
Free Soloing: Getting Better Clients
Strategy and tactics for upgrading the caliber of clients you work with as a freelancer. There’s lots of good stuff in here about improving your self-worth, being proud of your pricing, and making more money with just a few small changes!
If you can afford it, I believe this is an extremely cost-effective way to maximize your ability to attract the rights kinds of clients and empower you to ignore (or fire) the wrong kind.