Jobs at small Salt Lake City companies nobody posts about - any advice?

I asked around at a community meeting and got three leads. This is my first time dealing with any of this. One is a print shop, one is an accounting firm and one is a clinic. What do you write in a cold email?

A short email with two sentences about what you can do and your résumé attached worked for me. I followed up after a week.

Keep a list of who you contacted and when. It makes follow-ups easy.