I.e., the "make your own luck" aphorism - the more you open yourself up to opportunities, the more likely you are to get lucky in the first place (finding an opportunity to generate riches).
So like, meeting lots of people, talking to lots of people, going out a lot. Not staying in, and if you are staying in, increasing your knowledge-based surface area.
Pretty much my go-to advice when I'm mentoring job seekers - the more people see your resume, the sooner you'll get a job, one way or the other. Nobody's gonna hire you if they don't "see" you.