I used a 8" length of colored lanyard. Different colors
up to #) Yellow!
Everytime I saw a boy doing something "good" he got the next level of color which he would larks head knot through the button hole on the temp patch side. I never said what the levels were for, but the boys went up (AND DOWN) the levels. One went up one step at a time, but a major infraction could mean starting all over at the beginning.
Finally one boy reached the top level and asked, "Now what?" I simply said stay at that level and find out. Eventually the top level boy screwed something up and deserved to drop a level or two, but I used it as a learning opportunity to reinforce I had noticed many good things he had done at the top level and got no recognition for, so I didn't take it down a level.
Word got around and some of the boys leveled up, others "didn't bother, it wasn't worth anything."
About a month later, the boys were sitting around the campfire and it hit the 10:30 pm, lights out. I said, "everyone with blue and above stay and put out the fire, everyone else hit the sack." One of the boys jumped up went for the bucket of water and another headed out for the shovel. When they got back I told them to all sit down and enjoy the dying coals, there's no hurry." the discussion on improved behavior and helpful attitudes ensued thereafter.
2 of the boys had their yellow lanyards on their Eagle preso boards at their ECOH so somewhere along the line it took on some importance for some.