I'm currently building up and publicising my new forklift mobile repair and service business. Does anyone have any advise on weather they know if potential customers prefer to be contacted by phone offering services and prices or do you find you have more success by door knocking and asking if "may I be able to speak to whoever is in charge of your forklift maintainence?'' I've gotten fair results both ways but am trying to narrow it down to the most efficient way. I'd be greatful for any help at all on contacting/finding customers as I am only new at this.