Take lots of pictures and videos, too!
Because days are going to be long, taking photos will be the last thing on your mind. But try to document your time together as often and as much as you can.
Document their cuteness, the sound of their voice while they’re little, their silly dance and antics. Take photos of that time he stuck potatoes inside your shoes, or drew eye brows on the dog with your lipstick, when she drew doodles on the walls and played picasso with your toothpaste. Documents those antics.
Keep these photos and videos so you can show it to their girlfriends/boyfriends in the future, or blackmail them into visiting you on weekends, but most important, cherish these photos and videos because when they’re done driving you crazy at home they will get married and drive someone else crazy in their home. And you will miss them.