I think the best way is to simply think about the products and services that mean something to you. The ones you use on a daily basis are the obvious ones. Or an app that fills a niche that no one else is working on but you’d like to see it brought to fruition.
For me it’s thinking wow, I use nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5 every day, that brings me a lot of value. Without nostr:npub155m2k8ml8sqn8w4dhh689vdv0t2twa8dgvkpnzfggxf4wfughjsq2cdcvg I couldn’t accept Bitcoin payments. Those are two that I personally use daily that I couldn’t live without. Your list could be totally different but that’s why it’s important to support what you personally want to see built.