I like Tina's point on monitoring your efforts.

R U cleaning houses? Organizing them?

IMO, you would be better off, since this is your first DM (direct mail) offering to do some testing. Send out 10 cards, see what happens, etc.

But before that, you need a marketing funnel and a plan to monitor.

For example:
Mail peice 1 - gets them to your website where they join something and get something free. But only if they request it in ___ days.
Mail peice 2 - get's them to your newsletter.
etc. etc.
One people join your newsletter, then you provide them with a discount on your services, etc.


Consistancy is a key.