Maintain your LinkedIn, write little articles about implementations on a tech blog, check issues on popular github projects and make PRs, create a portfolio website. Register as a company and do some freelance work, even if it's just a cheap website for your grandma's knitting club.

Do the tour/tutorial of every popular language/framework. Learn the basics of react/vue as a backend dev, learn some sql as a frontend dev. Set up a vps server at DO or AWS, host a few small services. Fullstack is bullshit, but communication is key in development, which means you need to know about the whole playing field.

Recruiters can be useful, but knowing developers in your area is even more valuable. So especially if you're unemployed, go to hackathons, conferences and meetups.