Prioritize consuming only thoroughly cooked meals served piping hot from busy restaurants and hotels where high customer turnover minimizes bacterial growth, drink exclusively bottled or boiled water without ice cubes made from potentially contaminated sources, and select thick-skinned fruits and vegetables like bananas, oranges, apples, and avocados that you peel yourself immediately before eating. Avoid risky items including raw or undercooked shellfish particularly in tropical regions, salads and fresh produce washed in local tap water, runny eggs, unpasteurized milk/cheese/yogurt, and street food from low-volume vendors until your stomach adapts after a few days. Practice rigorous personal hygiene by washing hands for 20+ seconds with soap before every meal or using alcohol-based sanitizer containing at least 60% ethanol, and carry preventive medications including oral rehydration salts, loperamide (anti-diarrheal), probiotics, and antibiotics prescribed for traveler's diarrhea. Gradually introduce popular street foods from vendors displaying long queues, clean preparation stations, and protective gloves; vegetarian steamed or fried dishes often represent safest options globally. Smartphone apps like HappyCow, Yelp, or TripAdvisor help locate highly-rated hygienic eateries, and clearly communicating allergies or dietary restrictions using translation apps prevents misunderstandings.