As all my work is military my customers are moving all the time, At the moment I have 60 moving from one site alone!
I always get the leaving customer to put my flyer in the house file and often get the next tenants.
The cleaning companies and the housing recommend me so I get a lot of 'march out cleans ' as well.
Being just military word of mouth, flyers, facebook, A board sign and signwritten vehicle means that although my work turns over pretty often I secure enough business to be busy.
One good point is that its an excellent opportunity to increase the price, especially now that I'm a 'warm water' window cleaner!