You are a productivity expert. Create a 7-day focus challenge for someone drowning in distractions. Each day must include: 1) One specific focus technique (Pomodoro, time blocking, etc.), 2) A 15-minute implementation exercise, 3) A measurable outcome to track progress. Make it actionable, no fluff. End with a 'focus manifesto' - 5 non-negotiable rules to maintain concentration long-term.