We flew into Charles de Gaulle airport and on the advice of travel guru, Rick Steves, we took a taxi (50 Euros) to our hotel. Given the fact that there are about two escalators in the entire city of Paris, I was happy to pay for a taxi and not schlep luggage up and down a myriad of stairs in and out of metro stations. On our return, also on the advice of Steves, we took Blue Van back to the airport--less expensive (35 Euros with tip) and very reliable.
Use the ATM at the airport for getting Euro's. It is the least expensive way to buy currency. No need to arrive with Euro's at the airport. There is an ATM near the exit doors leading to the taxi stands. You will get the best exchange rate by using ATMs. And I always notify my bank when I am leaving the country so that I don't have any problems using my debit card.
Rick Steves is the travel guide I use most--I like his traveling philosophy (but not his politics which we won't go into here). So I always take one of his books and usually one other book such as Eye Witness, Frommers, or Fodors.
To avoid jet lag going to Europe, I sleep on the flight (after removing my make-up, slathering moisturizer on my face, and brushing my teeth--pretty much mimicking my bedtime routine to fool myself into thinking I'm going to sleep) and then once I arrive I get as much time outdoors as possible and don't go to bed until around 10:00 pm when I take two Tylenol PM, sleep, and wake-up ready to explore.
Still haven't figured out how to beat jet lag on the return home.