I had just picked up some self-adhesive weatherstrip to seal around my front door (about $5), and I realized that this would work great on making my headphones more comfortable. I simply cut two strips from the leftovers to the right length, peeled off the backing, and stuck them on the top of the headphones. I used two pieces so that the headphones still fold up.
The headphones are now much more comfortable. I use them at work so that I am less distract by my coworkers. I can listen to music all day without the headache. This simple life hack makes my days much nicer.
The self-adhesive weatherstrip is a great product, and I been looking for other simple ways to put it to use. If you have other ideas for uses, put them in the comments.