So, you miss your flight or train at the beginning of the week. That's okay -- with your creative mind and optimistic spirit, you can come up with an alternate itinerary on the fly that'll be fantastic. On Thursday and Friday, investigate the background of tour operators, look at your room before you check in and generally regard transactions with healthy suspicion. And that goes double if anything seems like an amazing deal. This weekend, a guided museum tour or something similar engages your brain, and may provide someone whom you can discuss your reactions with.