NNA members have access to past postal webinars, such as Privileges to Help Publishers, put on by the NNA Postal Team and the Max Heath Postal Institute™.
NNA Postal Chair Matt Paxton, publisher of The News-Gazette in Lexington, Virginia, led the program and shared examples from his paper and 'nuts and bolts' of how to sample. View here with member login: https://bit.ly/3DF4OEq
Note: if you do not have a login, click 'login' anyways, then register!