Do I need to speak French?

You don't need to be fluent, but learning 'Bonjour,' 'Merci,' and 'S'il vous plaît' is mandatory. Always greet shopkeepers when you enter a store.

Is the Paris Museum Pass worth it?

Only if you plan to visit at least two museums every day. If you prefer a slower pace, individual tickets are better.

How to plan the perfect 3-day Paris trip

To see Paris in 3 days, group your sightseeing by neighborhood to minimize transit time and book your museum entry slots at least two weeks in advance. Stick to one major landmark per morning and spend your afternoons wandering the historic districts.

Map out by district. Group activities by geography. For example, keep the Louvre and Palais Royal together, and keep Montmartre and the 18th arrondissement together.
Book your museum slots. Use the official websites for the Louvre, Musée d'Orsay, and the Eiffel Tower. Never show up without a timed reservation.
Master the Navigo Easy pass. Buy a Navigo Easy card at any Metro station for 2 euros and load it with a 'carnet' of 10 tickets to save money and skip lines at ticket machines.
Build in 'flânerie' time. Paris is best experienced by walking. Don't schedule more than two 'ticketed' events per day.

Do I need to speak French?: You don't need to be fluent, but learning 'Bonjour,' 'Merci,' and 'S'il vous plaît' is mandatory. Always greet shopkeepers when you enter a store.
Is the Paris Museum Pass worth it?: Only if you plan to visit at least two museums every day. If you prefer a slower pace, individual tickets are better.