Here are 2 ways rubber bands have worked for our family recently.
I have found that at the factory job I have had for the past 6 months that overalls were the best thing for me to waer. The problem was that I only had 2 pairs of overall and one was missing the metal fastener that holds the snap up as you can see in the picture below.
2. Recently the power cord formy laptop has become very persnickety. Unless you are holding it at a certain angle and applying a pretty good amount of pressure, it will not recharge the unit. My lovely wife found that by attatching the laptop to the power cord with a that it would not only properly charge the batter, but could also allow us to power it without the battery. This had become impossible without use of the rubber band.
So that's how the rubber band works for me. It has saved us money, time and frustration. To find out how other things (some not even elastic) work for others, click here for more WFMW at We Are That Family.