7. You're washing your jeans wrong
When washing dark clothes (especially your jeans) be sure to turn them inside-out and run them through a cold rinse cycle in order to avoid color fading. And if you want the most longevity out of your darks and denim, don't toss them in the dryer. Heat will fade them faster. Instead let them air dry on a line or drying rack.
8. Keep your machine clean
It might seem weird to wash the appliance that you entrust to, well, wash stuff, but you should be doing it once a year so that gunk doesn't build up inside. It's fairly simple, and requires running an empty hot rinse cycle with vinegar and baking soda followed by minor scrubbing.