I like packing. There is something challenging about it and sometimes it's very much like a puzzle to get everything to fit. Like anything else, the more I have packed, the more efficient I have become.
I'm teaching my kids to be involved in the process and they now help decide what we should take. (I still have veto power though!!) Connor at 3 years old has learnt that if you put too much in your backpack it quickly becomes heavy so only the favourites should be put into his carry-on bag.
Our family likes to travel with as little as possible, but when you are flying with children and have a stroller and car seats, gone are the days when we could take carry-on bags only. I now find it easiest if everyone has their own bag to check. The past few trips I have begun packing Connor and Reese's clothes as outfits instead of by shirts, pants, sweaters etc. Not only do I find this prevents me from over-packing, it saves me time at our destination because everything is already together and it forces me to visualise what will be really used during our time away.
Good luck packing!