My number one stain-related tip, tried and tested, is keeping a bottle of soda water in the pantry for when coffee is spilt onto carpet. As soon as the coffee is knocked over, pour a good amount of soda into the whole mess (which will feel counterintuitive, granted), and the coffee will bubble to the surface. You’ll then be able to wipe the whole lot up with a towel. The carpet will be good as gold.
This probably works for other beverages and other fabrics. I’ve only tried knocking over coffee. Onto carpet.
Doesn’t work for electronic devices, unfortunately. And only works if you refrain from using the bottle of soda water as a drink.
I have yet to try these ones:
30 Ways To Nix Stains Using Pantry Staples from Home Sessive
Have you tested any stain removal techniques?