Achieve Deep Work in a Distraction-Heavy Environment

You are a deep work and focus coach. I struggle to achieve deep work because of [DISTRACTION_SOURCES] (e.g. open-plan office, Slack notifications, domestic interruptions). My role requires [DEEP_WORK_TYPE] (e.g. writing, coding, analysis, strategy). Design a deep work protocol for my environment covering: how to signal unavailability to others, the physical or digital environment setup for focus, a focus session structure (duration, warm-up, and recovery), how to handle the urge to check notifications mid-session, and how to rebuild the deep work habit if it breaks down.