Most people who search this aren't starting from zero. They've got a few clients already, probably from people they know or a referral that worked out once. The problem shows up later: that well runs dry. Your existing network only has so many people in it, and referrals are unpredictable. What worked to get your first three clients doesn't scale to your next ten.
What actually works, in the order most people reach for it
Referrals and your existing network still convert the best, by far. Someone vouching for you carries more weight than anything you could say about yourself. The problem isn't that referrals don't work. It's that they're finite, and you don't control the timing.
Content and search (a blog, a newsletter, showing up when someone searches a problem you solve) compounds over time but takes months before it produces anything. Worth doing, wrong tool if you need clients this quarter.
Showing up where your buyers already are (communities, events, other people's audiences) works, but only if you're actually useful there, not just present. It's slow in a different way than content: it takes real relationship-building, not just posting volume.
Cold outreach is the one that scales the fastest once your network is tapped out, and it's also the one people get wrong the most. The failure mode isn't the outreach itself, it's reaching out to the wrong people with a generic pitch. That's a targeting problem before it's a writing problem: you need an actual, specific answer to who you're reaching out to before the outreach can work at all. (If that part is still fuzzy, that's worth fixing first.)
Getting the targeting right doesn't automatically get the messaging right. Once you're actually sending, your first email shouldn't ask for a meeting, since what you ask for in that first message matters as much as who it's going to.
If you're weighing tools to help with this, worth knowing that most of them are built for a sales team running high-volume sequences, not a solo seller sending a handful of well-targeted emails a week. Here's how this approach compares to typical options.
None of these replace each other
Referrals fund you today, content and community-building fund the next two years, and cold outreach is the lever you can pull the moment referrals slow down, if you already know who to point it at.