The title says it all.
Step 1: Materials
Stuff That You Want To Display
Step 2: The Nail
Hammer a nail into your wall unless there's one that's already there.
Step 3: The Hanging
Your cigar box probably has one of those snappy-closey thingies. If it does, you may notice the snappy-holey thingy. That's where you should put the nail (my entire nail fit through but if yours doesn't, you should just put the nail in after).
Step 4: The Displayering
Now you just gotta put the stuff that you want to display in the cigar box and you're done!