Here are a few more.
Given the current state of the economy and the fact that most of the economic growth in the country can be attributed to the firearms industry, HIRE PEOPLE. Not getting an answer on the phone or through an email is what costs you business. Also, hire an IT person to keep your website up-to-the-minute accurate. Have a page of current FFL's for a given location so we can pick with a click instead of chasing one down ourselves. More businesses fail because of poor customer service than for any other reason.