Ask HN: How do you struggle with/optimize for deep,sustained focus?

With digital distractions everywhere, and nowadays the need to have all these context switches between tabs, messages, emails, papers, prompting LLMs, literally anything, I feel like the ability to maintain deep focus on a high priority task is harder than ever. For those struggling with this, what are the main stressors for you and how do you deal with it to maximize productivity in your work sessions?