Setup
Start with the device you use most often, then close the loopholes on the other devices that can pull you back into the same distractions.
Qwit Block is deliberately simple: choose what should be blocked, make the block hard to bypass, and keep the configuration understandable enough that you can maintain it over time.
Treat this as a working template. The exact blocklist and restriction level should match your own risks, work requirements, and devices.