Including our initial reply, we contact each and every inquiry five times! The first two are done on the first week of the inquiry, and the next two on the following week.
Additionally, we send each inquiry
a survey and they are added to our image of the week club (which is found in my signature).
On
our contact page we have a check box that the prospect can fill out if they do not want to be contacted, which they never check because why would they be filling out the form in the first place.
The image of the week program is nice because it is an automated thing, and it jogs the prospects mind every week until they opt out of the mailing list.