Others told me to preplan LOs. that way you will have pics, paper and embellies ready to use without bringing your entire stash.
some items that are common forgot because you use them all the time are:
mat to cut/do adhesive on
if you like items that need to dry, like stickles, i recommend leaving them home. you won't have enough space or time to let them dry properly. take some sticky notes to remind you which LOs to add them to at home.