Same as these guys. Family owned and been around since 1980. I've owned the last 12 years, and I think I've advertised one time, I know my grandparents did it very little in the years before that. I'm only a one man shop, so it doesn't take a lot to make me busy, but what these guys said, customer service, and teaching customers that you're more valuable than a cheaper price.
I used to think I had to land every job that walked in the door...nope. I turn stuff down all the time now if they're just shopping for lowest price, I even tell them sometimes I'm not gonna be the cheapest if that's what they're looking for. Best move I ever made. Now I have way better clients, most are weekly or monthly repeats that come in the form of an email, and I drop it off when it's done. Hoping in the next 10 years to have enough repeat work each week that I can abandon the "retail storefront" setup that I have now.