Here's what to do.
First of all, find out where the jobs are. Some board for your niche or something like that. For me it's efinancialcareers. Now efinancial is still a black hole if you try to use it to apply through, but what you're really after is the recruiter details.
You then phone up the rec, or you write to him on LinkedIn. A lot of them are crap at responding, but that's how it is. Phone a few, and convince them that you are the real deal for whatever it is he recruits for.
They'll all want an updated CV. They need it to be able to proceed, nobody will place you without one. Good news is it isn't that hard, just highlight the relevant bits for reach recruiter.
The rec will then say "I've got a job at X, Y, and Z. X is a this kind of co, Y is looking for blah..."
When they have some of those details it means they actually have something. Otherwise it's just a generic company that they will find later. By find, I mean they will forget you by the time the job comes. One guy told me straight up the ad I responded to was not a specific job, it was a honeypot to lure candidates.
So now the companies get your CVs, and they decide whether to interview. If the recruiter is good, they will interview you maybe 3/4 times. Companies often screw up their own internal hiring process and ask for CVs when they aren't ready. But the other companies should be willing to interview you. This is where you find out if the rec is crap, because a fair few of them will just not tell you anything about what happened to your CV.
It's still a numbers game. I've got over 20 recruiters listed on my Trello, most of them did nothing useful for me.
It's probably worth cultivating some relationships with the recruiters. You learn a lot about what the market is doing for free from them.