Founders & makers, How did you find your first 100 early adopters?

As I'm building Grabee.com one thing I have learned is that I think the most important thing is to not just look for early adopters but to make them. I'm reaching out to people who might be interested in it not just contacting random strangers and hoping they'll buy from you. So I'm creating content that speaks directly to my target audience and then sharing that content with those people on social media platforms where they hang out. In short: don't just sit back and wait for people who are going to buy what you're selling. Go out there and make them want it! So how did you find your first 100 early adopters/believers for your product?