Preparing your skin for a sun holiday involves a proactive routine to build a healthy barrier and ensure an even tan. Start exfoliating twice a week about a month before your trip; this removes dead skin cells, allowing your sunscreen to penetrate more effectively and your tan to last longer. Use a gentle scrub or a chemical exfoliant with AHAs/BHAs, but stop 48 hours before departure to avoid sensitivity. Moisturizing is equally critical; switch to a richer body butter or oil containing Ceramides or Hyaluronic acid to maximize skin hydration. Diet plays a role too—increasing your intake of Beta-carotene (found in carrots and sweet potatoes) and Lycopene (tomatoes) can help your skin better defend itself against UV-induced oxidative stress. Most importantly, start using a daily broad-spectrum SPF 30+ even before you leave to prevent premature damage. If you plan on using self-tanner to get a "base glow," apply it at least 24 hours after exfoliating to ensure a streak-free finish that won't flake off in the salt water.