We recently worked with a tech person to help set up our Big Pour (an event where we invite local people to come in and shop in our warehouse), and he pointed out that even though we are an internet based company, most of our operations function "off the grid".
The way we handle our purchase orders, our accounting, our inventory, our payroll. Plenty of these things are done a very old fashioned pen-on-paper way. While this worked for a long time, we are pulling up our big girl boots and trying out new ways of doing things.
One of our areas of weakness is inventory control. So far, we have relied on Van's amazing memory, but that's not really working any more. In figuring out how we can improve, I stumbled on this very helpful, easy-to-read primer on the basics of inventory control.
The advice here is forehead-slapping simple.