I started off wit h masking Tape and Sharpie
then upgraded to the Label maker
for the bins we store on the club trailer, i plan on putting on sheet protectors double sided tape, then writing contents on a piece of paper and sliding it in the sleeve. this way if the content change, just change out the paper, flip it over, and write new contents on it. something comes out, mark it off, something goes in, add it on. hope this will be a simple solution since we have multiple people going in and out the of the trailer looking for things, putting things in. will only work IF they read the labels and update them when required.