Word-of-mouth leads in San Diego after 8 years as a retail manager

A friend who works at a local manufacturer says there are openings not advertised online. I am in San Diego, in case local advice matters. One is a print shop, one is an accounting firm and one is a clinic. Should I visit in person?

Thanks for writing this out. I went through something close to it 8 months ago, and it settled down once I kept a simple log of every call and form.