Over the years I have forgotten a few things. we started taking vacations when DS was 10 months old......he's 14...DD is 12 and DS is 8.
Something I did 13 years ago prior to our first trip to WDW is keep a note book in the kitchen...every time I thought of items we would need I would write it down, afterall, we have never been on vacation with a baby before and plus we were driving. After a month or so, I created a Vacation doc in Word itemizing all the things we need to pack. As we had more kids that list sure came in handy as my free time became less and less. I finally updated the list taking off many of the baby items we no longer need. Even though we don't always take everything on the list, it's wonderful to have.
I also have a "The Day We Leave Check List"....nothing like driving on vacation and trying to think "did we close the garage door
" All my checks are on the paper and we drive away worry-free