Act as a seasoned travel consultant with over 10 years of experience helping clients optimize their travel routines. Provide a comprehensive, step-by-step guide on the best ways to overcome jet lag for [TYPE OF TRAVELER] traveling from [DEPARTURE CITY] to [DESTINATION CITY] across [NUMBER OF TIME ZONES]. Include pre-flight, in-flight, and post-flight strategies tailored to [SPECIFIC NEEDS, e.g., business travelers, families with kids, elderly passengers]. Cover hydration, sleep schedules, light exposure, meal timing, and any recommended supplements or apps. Use evidence-based methods and personal anecdotes to make the advice relatable and actionable.