A trades business can develop considerable rapport with their customer base by establishing a schedule of programmed services to be carried out, especially at households. This is done by preparing a list of normal work that (say) a plumber has to do around a residence on a six monthly or annual basis and encouraging customers to set up an appointment for the time that work is going to be undertaken for them.
The key thing is that the work is carried out in a very efficient tradesperson like manner and more importantly that you arrive on time.
Programmed services can assist with planning, cashflow, and gaining additional business for yourself. Of course, if you are booking appointments months ahead of time, it’s a good idea to send a reminder/confirmation a week or two prior to the actual date.

