Put all your other stuff (and your nail scissors/leatherman/screwdrivers
etc) into your suitcase or holdall or rucksack and that gets "checked"
onto the plane when you arrive at the airport. Sometimes you need to
reclaim it on entering an country (we do when travelling from the UK to
the US) and then re-check it onto your on-going flight, more often than
not it is checked right through to your final destination.
your flight is long enough to have a film or audio entertainment take
your own comfortable headphones, but you will need an adaptor to fit the
plane twin-socket. Wear comfortable clothes and shoes which slip on
and off. Remember that you will have to go though a metal detector gate
so a jacket which slips off easily is also a good idea - put all our
small change, keys and cell phone in your jacket pocket to go through
the X-ray machine. Don't forget to take the pocket knife off your
keyring and leave it at home or put it in your big luggage.
Take a good book or three, there can be lots of waiting around.
Oh yes, and HAVE FUN!