Stop romanticizing the four-day slog unless you actually enjoy carrying 30 pounds of gear. The two-day short trail gets you the same sun-gate entrance to Machu Picchu without the altitude sickness misery. Book the small group tours—six people max—so you aren't stuck behind slow hikers. Spend the extra cash for the panoramic train back to Cusco; your legs will thank you after the final climb. Wear broken-in boots, pack electrolytes, and skip the massive tour buses.
