With Dropzone Commander, as with most minis games, there are a lot of extra tools players use to help the game go smoothly. This can be things like laser lines to accurately check line of sight or one innocuous little tool that Dropzone players have been using: the stitch counter.  This little device is a great way to track the damage done to large items that have a high damage value like buildings.  With building destruction common in Dropzone and buildings having damage points as high as 40, a concise way to keep track of this was needed and the small footprint of the stitch counter worked perfectly.  You can pick them up at hobby stores or find them in bulk online.