As a Texas CHL holder, I have:
No felony convictions--lifetime
No Class A or Class B Misdemeanors within last 5 years
Passed both State and Federal fingerprint and background checks
No delinquent conduct within past 10 years
Not become delinquent in child support, student loans or state or local taxes.
How much do you know about your other friends or customers?
I've seen that, and there are some folks in Minnesota who are doing something similar:
http://noguns-nomoney.com/
I prefer this because it's cleaner - less cluttered, and because it gives me space to write my name, etc.
I tossed out the idea of dropping business cards, some years ago, and I still wonder if that isn't the best. Businesses might respond better to identifiable professionals, rather than anonymous gun nuts.
Of course, there's always this, which I saw posted in another thread a couple of days ago:
Excellent point, and one that should be made frequently.