Have a packing routine
You know how it goes, the things that you do regularly become like second nature and you can waltz through them without even thinking about it. Now you drive your usual work commute easily when once you’d worry about getting lost. Making your favorite casserole is such a cinch after 4 years that you can’t remember the last time you looked at the recipe.
Packing for vacation can be the same, all you need is a good solid routine. Use the same bag so you know how much space you have, lay things out in the same place so you can tell if something is missing. You can even have a ready-to-go wash bag full of miniatures if you travel a lot. Put on your holiday packing playlist and you’ll be done in no time.