Must haves for travel - Camera, food, and underwear. But, underwear is rather optional.
Travel tips - Don't plan it too much. Be informed enough that you don't miss the must-sees, but don't get caught up or pass up moments and memories because of schedules. When it comes to traveling, I view the first chapter of Steinbeck's book to be my bible for travel planning:
"A trip, a safari, an exploration, is an entity, different from all other journeys. It has personality, temperament, individuality, uniqueness. A journey is a person in itself; no two are alike. And all plans, safeguards, policing, and coercion are fruitless. We find after years of struggle that we do not take a trip; a trip takes us." John Steinbeck, Travels with Charley. I think every traveler should read the first chapter of that book before they take a trip.