From some experience and some thought - in no particular order:
Magazines operate 2 to 4 months in advance of publication, plan accordingly. Check the circulation vs ad cost. Might check with SWAT mag execs for faster ad dates. And maybe Rich Lucibella would look fondly upon his "grandchild", so to speak, to advise the often needed information for structuring an organization.
15 or 30 second TV/Radio ads with a solid message will work... off hours, early AM, some afternoon times, & different days work re expense. Prime time costs!
Newspapers, while politically motivated, can work; but take the high road, no in-your-face Ragin' Cajun ads.
Hunter getter? Try: "This fall may be your last hunt! Were you planning to retire?" Appropriate graphics, of course (scoped rifle & shotgun included, maybe screened down game, rounds and shotshells).
For the hunter world, use the local town and county papers - rates are better for one thing, target audience too. For urban world, rights are one thing - robbery, rape, drive-by shootings, knifings, car-jacking, home invasion. etc. - are another... more concern. Why? Watch the 5PM through 6:30PM news... how many of these events are reported most every day?
Flyer/countertop/window displays can work. Doorknob hangers work in the right market.
THR-ers in local groups might have a Saturday coffee in an eatery where interested folks might drop by - if they know of it, of course. Include local activities in your local flyers.
And if the THR "business card" comes online we'll have that to download, print and distribute.
BTW: Literature/media might require copyright protection; it probably will need appropriate disclaimers.
While organization, enthusiasm, and work is involved, the material distributed and the words spoken, while forthright and passionate, must be true - and proven so where necessary.
Some among us are prolific writers, others I'm sure, carry the oral word well. These folks should be prepared - to write - to appear - wherever, whenever invited, whether a local meeting or TV/radio show. Let us not forget "Talk Radio" as a medium. We have a member who, if persuaded, might help in this area.
If they'll let you - use our gals. Show that women have (2nd A) rights too, and may, can, and DO own firearms for fun and personal/family protection - and more every year. But please, no leather clad 30-gun-toting graphics.
Timing - is everything. Generally, we are in the right time frame. The election performers and operators are gearing up for heavy work - whether it is national, state, or local, their plate is full. They will be watching the numbers all summer and proving or disproving their techniques. This is a key time to affect policy at many levels.
In my opinion, the activity proposed here to rally grass-roots support for RKBA, if organized, planned and executed reasonably well during this election time frame, can be our most effective non-choir effort to change things.
CAUTION: Going to another group is NOT viable. Too subject to their agenda(s) and their baggage. Stay in control.
Lastly, as it might be useful to strike up an RKBA conversation, please ask many of whom you will meet - - Are YOU the Militia?
-Andy