The constantly changing, ever-stimulating circumstances of travel keep you on your toes at the beginning of the week, and you're loving every minute of it. It's life in double-time, and you've got the energy to embrace it all. Skip the tour group on thursday or friday; you'll have a richer experience off on your own. Do bring a map, though, and be leery of any too-good-to-be-true offerings. This weekend, conversations with others: fellow travelers, locals at a cafe, a cabbie: are just as fascinating as seeing the sights. Be sure to ask for their best recommendations and tips.