Let me know if I missed any
- FPS/response time/hertz/input lag
- Disabling shadow/enabling BenQ's Dyac
- V Sync/Free Sync/G Sync - worsen performance since they cap hertz to fps and higher fps is always better even if hertz is lower.
- Glitching/Hacking/Colluding
- Studying pro's at Twitch, asking questions and mimicking your mouse to their movement to train expert muscle memory
- Comfortable mouse/keyboard/Headset doesn't need to be high quality right? Just good enough
- Reading updates on game changes and game discoveries
- Ping (no way to improve it, right?)
- And obviously practice, preferably with cold Room temperature and hydration