Don't carry on everything you own. Pack a change of clothing and a bathing suit plus essential toiletries in your carry on and check the rest. I've flown over 150,000 air miles and have never had a bag get to me later than the next morning. Clearly label your bags with your name and preferably business telenumber both inside and out, and make a mental note of three unique items inside your bag, as well as the style and brand.
I always carry on a bottle of water, and drink it during the flight. It helps to prevent drying out from the arid cabin air, and IMHO helps with jet lag. Also eat something before you board to prevent motion sickness...I prefer something starchy like a roll or bagel. Bring along snacks for your daughter, airline food is not appealing tomost kids. Some carriers don't even serve meals on board anymore, others you can special order a kids meal by calling customer service a week or so in advance.
Wait until your row is called to board, your seat will still be there. Remember your row and seat so you can find it easily when you go down the aisle.
Plan on getting to the airport 90 minutes early. That way you won't feel rushed or panicked, even if the check-in lines are long, or there is traffic.
Most people no longer dress up to fly. However, for safety's sake you are better off wearing long pants and long sleeved shirts made of natural fibers, and flat bottomed shoes with cotton socks. Definite safety no-no's are dresses, high heels, pantihose, nylon anything. I generally wear chinos and a light weight cotton, wool, or silk sweater, with oxfords.
Another safety item...count the number of rows before you and in back of you to the emergency exits. Make a mental note of them.
When you get to the gate, ask about the possibility of your daughter seeing the cockpit. The answer will depend on a lot of factors, but they are often more than happy to oblige.
If you aren't in a rush to make a connection, let the passengers who are, or those who are just inconsiderate and rush up the aisle ahead of others in more forward seats get off first.
A REAL Biggie-- Check the seat pockets before you get off. I can't tell you how many times I've heard of kids leaving Game Boys and such in them, and not getting them back for a variety of reasons.
Happy flying!
Anne