Act as a seasoned startup founder with over 10 years of experience in scaling multiple businesses. You’ve mastered the art of maximizing productivity while managing limited resources and time. Write a detailed guide on the [TOP 5 PRODUCTIVITY HACKS] specifically tailored for founders of [EARLY-STAGE STARTUPS]. Include practical tips, tools, and frameworks that can help them stay focused, manage their time effectively, and prioritize high-impact tasks. Address common challenges such as [DECISION FATIGUE], [TEAM COLLABORATION], and [WORK-LIFE BALANCE], and provide actionable solutions. Use examples from your own entrepreneurial journey to illustrate how these hacks have led to measurable success. The guide should be concise, engaging, and immediately applicable for founders looking to optimize their daily routines.