When I was a teenager, I had the best backpack for school.  It had plenty of room, plenty of pockets, and even wheels for when it got too heavy!  But one day, one of the straps broke; and as hard as I tried to keep using it, my faithful backpack just wasn't the same after that.  If only I'd thought of this...

Anytime you have a strap with a plastic clip that breaks, grab some zip ties and keep on goin'!