While all of that may seem pretty straight forward, there is actually a maintenance item that seems to get forgotten about quite often - Where the SE cable (the main power line) enters the meter box. But why is this an important area of concern?
Consider what I see inside of electric panels. For one - moisture. As moisture runs down the SE cable it runs into the meter box. After that it really only has one place to go: inside the cable coming out of the bottom of the meter box. After that, I usually end up finding it inside the electric panel.
So to avoid this type of safety issue, seal off the SE cable entrance point into the meter box.