You might also want to pack a few snacks in case you don't have time to grab food before your flight.
"I've quite literally missed a flight because I thought I had enough time to get lunch. These days I always pack a bag of nuts, an energy bar, and usually an apple or two in my personal item...just in case.
Keep in mind that if you pack a liquid-y food like yogurt you'll have to pull it out at security."
Yeah, some are only 10kg!
There is no step 2.
Enjoy your flight.