As a gift to myself for my 40th birthday, I booked a flight to Lisbon. I had traveled for years for work, all over the world, and with friends across Europe and Asia, but this trip was just for me. I wanted to book the activities and tours that appealed to me, and only me. If I wanted to sleep in, I could. If I wanted dinner at my villa with a glass of port, a good book, and a view that did all the talking, I could do that too. And on every small group experience I booked, wh