Pack like me and you will have no worries.
Night before departure I run around the house packing stuff and writing it down on a piece of paper. Once the suitcase is full I review the list and make sure I have all the important stuff (nothing really it is all replaceable) razor, bathing suit, underwear, nice cloths blah blah. If I missed something important then I add it. Once that part is done I weigh it, if it is over max weight I toss stuff out until I meet the weight requirement.
I do all that in about 1 hour or less.
Now for the things I toss out I try and remove items that can be carried on a plane and stuff it into a carry on bag.
Simple no stress. Best part is I am done in less then an hour and my G/F is standing there crying.

because she is so lost on trying to make it all work. So glad I am a simple guy

Bookmarks