I love the graph! I don't go that far but I certainly understand how great it makes you feel. My pre-planning tips are as follows:
1. Ziplocks - I categorize everything (except clothing) and "pre-pack" in big ziplocks. I have one for our FE gifts, FE, secure tie and FE list, one for "just in case" things like aloe gel and pepto bismal (that one stays stored in the suitcase under the bed), One for kids activities, one for shower products, etc. You can see what is in them easily and then the day before, you pack them all in quickly. If you think you forgot something, it is easy to check without scavenging through your whole suitcase. We re-use them on vaca to keep snacks dry and critter free and then for the last wet bathing suit trip home.
2. One clear folder with all travel documents, boarding pass, reservation confirms, etc. in order by need (i.e. boarding pass 1st, hotel ressie 2nd, embark docs and passport 3rd, etc). My phone is replacing most of that now, but I still like the folder so I can check and recheck that I have everything set up before we go.
3. I have a little notebook that I start when I book the trip. It has one page for questions to ask, one for things I want to remember to do on board (I add to it as I read them here), one page for things I need to buy close to the trip (sunblock, prescriptions), one page for to-dos like hold mail and notify neighbors and one with all the details that I need to reference (date of sailing and return, room #, ressie #)
A little obsessive, yes, but every time I open that notebook, I get excited for vacation!