I was just thinking, does anybody follow up on quotes after a couple of weeks of giving them? Most of the tradespeople I've dealt with have always followed up with a call just to find out if I'm wanting to take the quote up etc.
But maybe it's worth contacting those people who you never got back to in the last 3-6 months to find out if they've had their job done? Perhaps just say that you're having a paperwork sort out and just wanted to make sure that the copy of the quote you have won't be needed anymore if the customer has had the work done. That might refresh the customer to actually get a job or two booked in.
It seems that if people are now coming forward a year or more after the original quote, maybe they got cold feet first time round because of the recession but now things may be a bit more stable for them, or they've had time to save some more money or whatever and finally get the work done.
sorry for rambling. just some thoughts going through my head.