...when you schedule a 7-hour prep for Wednesday, then realize at 11 pm that 1) Wednesday is a religious holiday and 2) you'll have houseguests.
...when you can't remember what day of the week it is, because it's always time for lab.
... and most of all, when you pick up a foil-covered casserole dish and look around for the autoclave tape.*
*To make sure the chicken gets properly sterilized, of course.
