Which marketing strategies have brought you the best customers?

In my experience the best customers usually come from Google and referrals. Focus on getting as many Google reviews as possible and making sure your business shows up when someone searches locally. Yard signs can work well too, especially when you leave them at work for a few days. People in the same neighborhood often need the same service. Thumbtack can help get things moving early on, but long term I would focus on Google presence, reviews, and word of mouth. Those tend to bring the highest quality customers.