While using my laptop, I'm usually on the couch, and it's usually plugged into AC power. The power connector gets tugged occasionally, whenever I move the laptop. Invariably, a few months of this loosens the plug or causes the cord to start coming apart, leading to mechanical failure. Not being one to simply accept a problematic design, I fixed it quite satisfactorily with a few self-adhesive wire clips from my local hardware store, as shown above. If the adhesive isn't strong enough, I can just replace it with epoxy. So far, it's worked great.
