If your trip to Portland is all organized but your travel itinerary is looking a little empty, let us give you a few hints and tips.Explore the best of what this place has to offer by adding Wadsworth-Longfellow House and Children's Museum of Maine to your must-see list. If you have an extra day up your sleeve, drop by Portland Museum of Art and Victoria Mansion as well.Plan a stop at State Theatre. It's one sight you'll usually find on most travelers' to-do lists. Thompson's Point and Portland Stage are also a stone's throw away and worth taking the time to see.