We have a standard packing list that is in our vacation tub with all of our travel items (luggage locks, collapsible containers for organizing things at the hotel, etc) that I pull out a couple of months before any vacation so I can start pulling things together and purchase anything that we need. Then we use our guest room bed to start laying things out. I separate them into sections (clothes for each person, toiletries, airplane items, etc.) Then I use sticky notes on the piles to identify things that we would need to grab closer to the day we leave. Yes, I have been known to reorganize things a couple of times before we go, but I think it's a bonus that anytime I want a little boost to my mood, I just peek in the guest room, sort through what we are taking, and it makes me happy.