Paris Itinerary

Make sure you book your tickets for the Eiffel tower ahead of going. I would do the walking tour. That way you are up and out and moving so that you don't crash or fall asleep on the hop on hop off tour or the bus. Also it will be good for your legs to be moving after so long sitting on a plane.

With relatively little time to spend in the city, I think you would be well advised to dig into Rick Steves' Paris guidebook to assist you in fine tuning your visit. You cannot see everything, but the guidebook is valuable in budgeting your time for the sights and events that most interest YOU.

From your previous posts, I can see that your interests are evolving, and to me, the most effective way to plan that once in a lifetime trip is to arm yourself with a great guidebook and let the author's expertise guide and inspire you. In addition to the RS books, I really love the Lonely Planet guides.

We were there for 5 nights last June. The 69 bus is a good way to get see a good bit of the city and you'll find other tourists doing the same thing.
We downloaded while at home Rick Steves App and downloaded his audio walking tours. Very good. Loved the one near Notre Dame. I think he has updated these recently, too.
We did a fat tire bike tour of Versailles and really liked it. The tour also allows you time to shop for picnic lunch and see the Estate of Trianon and Queen's hamlet. Don't miss this!
Get reservations to the Eiffel restaurant 58 ahead of time. I don't think you will need a ticket to get into the tower, but not certain of this.
We did a half day food tour of Montmartre area, that was a lot of fun, mainly due to our small group and the guide.
I personally don't like the hop on-hop off buses.

Just my preference, but I would hate being on a booked walk after a long overnight flight -- if on a self-guided walk (Rick's books include several) you can go at your own speed, sit in the sun on benches for as long as you need, do a little poking around stores if that appeals to you. Depending on how you respond to jet-lag, a tour bus can be an expensive nap.

The HOHO bus or #69 might not be a great idea for the reasons katsrad gave. Paris Walks does a Montmartre walk at 2:30 on Friday afternoons, ending at the Sacre Coeur with a sweeping view of the city. But you'll also want to explore the area on your own since you're staying there.

Another idea might be a Seine cruise, if the weather's nice. I like Les Vedettes du Pont Neuf. No reservation necessary.

See the Paris material under "Explore Europe" on this website, and invest in a guidebook. Rick Steves' Pocket Paris isn't as comprehensive as others, but it's very portable. Also a good map, I suggest the Michelin "Paris par Arrondissement" atlas or a Streetwise map.

Day one for me is always outdoors and walking to get over jet lag. There are great parks in Paris and that's where I'd start. I try avoid both dark places and sitting for a lengthy period. I try to sleep on the plane and stay awake my first day to 9 pm or so to adjust my inner clock as quickly as possible.

Ok lets walk this through.
Your first day.. you will arrive around 9.. ( never mind this 3am your time think.. you need to think in the time yourre in.. you only make it worse thinking about it the other way) .. Try and get at least a few hours sleep on plane..

You will likely get into Paris around 10:30 or 11 , depending on traffic and if your luggage arrives on time and the lines for customs and immigration on too long.

Drop bags at hotel.

Now.. I'm thinking lunch.. airplane food sucks.. especially airline breakfasts.. so you are will be hungry by then.

So me personally , I would find a place to eat.. do some people watching.. then I would spend afternoon walking around Montmartre , visiting the touristy but fun to see Place du Tetre , visit Sacre Couer..
So now you are still close to hotel area so you could go back and shower ... then out for dinner.. I would go down to the river.. for me I dont feel like I'm in Paris till I am by the river seeing Notre Dame... walk around Latin Quarter ( you do realize its light out till ten or so ) .. find a place for dinner. Try to stay up as late as you can ( its hard the first day because of jet lag) .. if you can stay up till 10 you can see the Eiffel Tower twinkle.. ( they lights they put on at the hour starting at ten in summer ) .. then head back to hotel for a good nights sleep.

I wouldn't plan anything intensive..

Just curious.. for a first trip why did you choose to stay in Montmartre.. its not exactly in the center of it all and you will be using the metro alot to go back and forth to other areas.

Don't be nervous, but don't plan any kind of tour or time sensitive thing on the arrival day. We've been on flights that have been two hours late arriving and that would really wreck any set plans. After getting to the hotel, grab a quick shower, and get outside. Sunlight and fresh air will do wonders for any jet lag. Find a place for lunch, do some people watching and walk, walk, walk around the area. It's understandable that you don't want to miss anything, but Paris is a place to be savored -- not gulped down. Take it easy and come back with great memories rather than just a mental blur.

The great thing about Paris Walks is you just show up and pay, so you can have the suggested Montmartre walk "planned" for 2:30 and if it happens it happens, if not..you're In Paris!! We usually get into town in the morning also, get to our lodgings, freshen up then hit the street. Grab something to eat (just walking there is fun, stop and take pictures, look in windows, grab a sweet treat for later at the Hotel), then afterwards have a destination to walk to, again just getting there is part of the experience. Have a plan "A" and a plan "B" for each day to make sure to see what you want and then other options if you still have time, energy and the budget.

Thank you for all your good advices. I truly appreciate it.I will try to get my bearings and do a walking tour and skip this buses.

I'm going to disagree just a little with some of the the advice given here. You'll probably get into the actual city itself closer to noon once navigating the huge immenseness of CDG, baggage claim and passport control, etc. The place is a zoo. You'll be tired and hungry when you get to your hotel and get checked in. SO yes- eat first! Where I digress is that I would not hesitate at all to get on the HOHO busses. But use them as intended and hop on and hop off! See an easy site or two along the route if time permits. Sit at a cafe! Soak in the atmosphere of the city.