[zorrophreak]

Energy Drinks (as simple as getting an energy drink and saying a whole box of four was fucked up and getting the four replaced.)
McDonalds (common sense)
Aftershokz used to be ungodly easy but they've cracked down.
Same goes with Logitech
Amazon refunding

I'll edit this with some explicit tutorials in a bit.

Thanks for the ideas! For the energy drinks, would I complain to the store owner or the energy drink's customer support?

Do it to the energy drink's customer support. Don't SE towards a small business.

@DeathScrub yeah never SE small companies. It hurts them harder and its just people looking to make honest money. The larger companies are able to easier deal with a social engineering loss. They'll survive but maybe take a hit. A small business or single owner business making less than 100k per quarter on average is going to be a harder hit and could cause them to go under. Always aim for larger companies. They could be small like a small niche product but never a small business owner.