A thing to note is that staff tend not to leave good companies. That means they recruit FAR less than you would expect.

A useful method would be to make a list of all the companies you can find that seem to both be going fine, but not obviously recruiting.

Getting your foot in the door with them is the hard part. First thing is to check if you have any contacts there. Ex-coworkers, or people who are friends with a staff member. If so, try and leverage that contact to get your C.V. to them. Failing that, a polite phonecall to HR or the boss (depending on the company), with a follow up email is the best bet.

This method still has a 95%+ failure rate. The aim is to get your C.V. in front of the right person when they need a role filled, but haven’t started the recruitment process yet.