We went to Paris for the 3rd time. This time I planned better. I booked at an AirBnB on a large houseboat on the Seine. It was just amazing. Then I used 3x5 cards with a spiral edge. I was able to list each place we wanted to see on one card. I entered the basic information such as days and times open. Costs, tours, phone numbers. Any night hours. I developed a symbol system to easily thumb through them. Along with that i jotted down a few details to remind myself of what major item was there. IT HELPED so much. Of all of the European countries we traveled in numerous years.... this alone was by far the most organized. The next one will even be more so.