Best Direct Mail Campaigns on Smaller Scales?

[David Bokman]

For those of you that have done direct mail on a smaller scale say 500-1000 per month what has been successful for you most? Besides zoning in on those "lists" has there been anything else that made your campaign stand out from the rest? Are you hitting specific locations or area's of town? How often are you sending out the campaigns? Monthly? 

How long did it take until you decided to start doing direct mail after being involved in REI?