Give them a reason to ring. EXAMPLE ... GET A THIRD CARPET CLEANED FREE. or something similar. Could be 50% OFF all stainguarding. Think about it... 50% off what... what ever you decide. This is just acouple of examples. These are just used to get there attention and gives them a reason to call. Also another good one is "dry in hours... NOT Days"
Whatever type of advertising you chose to use, it has to be used in its own way to try to maximise its impact. Try to treat all advertising as a seperate venture and use something to grab the attention of the person viewing. Try to make your advert/leaflet stand out from the rest.