If someone has already said what I am saying, I apologise, but I flew about six times with my LG before she turned one from Johannesburg to Dubai (Abu Dhabi)
Here is my tips:
Quietude is a natural calming medicine, no side effects and wont make baby sleep, but works like a charm
Baby should suck something during landing and take off
No restrictions on any baby products you take along (baby products does not include aerosol,lol)
Bassinet seat is the best for you, there is much more leg space and you have somewhere to put baby while you eat. First come first serve for bassinet, so check in early!
If you are taking a stroller, keep it with you till you board (you will be doing a lot of walking in the airports)
Rather take two bags than just one, the lighter the better, I preferred bags on my back
Don't hesitate to ask the flight attendants to help you, they hold baby while you go to bathroom and get your bag for you
Take a nice thick blankie or changing mat to change baby, the bathroom thingie is really awe full (I ended up doing it on the floor)
Relax, the more relaxed you are the more relaxed baby will be