once a week i make my guys wear a full sleeve rash guard with their color "belt"
on the right arm, where their watch would be, i progress them with stripes there. -(via sharpie, full rings around the wrist)
works out great, some guys love "belt" night, some (newbies) dont. but its a good way to keep tabs on who is who, and how they train.
i always find out that everyone tries harder on those nights when going against someone who out-ranks them. even if they roll with the same guy every other night, they still seem to put a lil more into it when they see the shirt/stripes...
must be a subconsious/mental thing