I recently heard that one person was doing this idea of supplying tracts to tract racks in many locations in his city.
The idea is to put a tract rack in many locations in your city and putting tracts in all the tract racks. If you don�t want to put the tract rack in many locations, you can try to at least put one in the church you go to.
Some ideas for locations are businesses and churches. You can also go to different churches in your city and ask if you can put up a free tract rack in their church. I would recommend that you leave samples of the tracts you want to put in their tract rack first to get their approval.
If you want to look for places that sell tract racks, please see this link.
You can also put tract racks at google.com and click on images.
If you are concerned that it will be too much money to do this, Fellowship Tract League has tracts that are not very expensive. They ask that you send an offering for their tracts.