Early on in my design career, I used to go to the xpedx paper supply store and spend hours collecting craft paper and things that people discarded to make my work interesting. Clean and digital is BORING. I like hearing the hiss of a fuzz pedal and the crackle of a dirty record. I like seeing text that's been weather-beaten and morphed over time. For me, that's interesting. That's beautiful.
So, I give you Lo-Fi Texture Supply. Textures, brushes, and motion assets that I create myself with brushes, sandpaper, or my trusty camera. They're all made with love and are things that I use in my daily work to help add that little bit of decay. Don't be afraid to get a little dirty!