I wear hi-viz jackets and shirts. I take off the jacket and have a bright orange or green reflective shirt under my body armor. My hydration pack is a bright green with reflective too. I also put LED strips and fog lights on my bikes, as well as strips of red/white DOT safety tape on the sides and rear of my topcase.
I still ride like I'm invisible, put better mirrors on my bikes and use them, leave my bike in gear when stopped at lights, point my bike between the cars ahead of me at lights, and rest my thumb on the horn while covering/using the clutch and brakes when something looks sketchy.