Some random examples where I do the execution of a task but my fiancee does the conception and planning, typically carrying that mental load for a while and then worrying whether I will execute properly:
-We paid for a farm share program where every week during the summer we pick up a package of berries/fruits. I typically pick up the package after work most weeks but my fiancee gets the emails from the farm, sets the choices of fruits for the week and reminds me to take back the previous week's boxes (punch card that gets us bonus fruit if we turn in 10 weeks of boxes)
-We are beekeepers (that'll be a future post in itself) and we typically enter our honey into our state fair's honey competition. My fiancee owns the mental load of tracking the deadline for entering our application, figuring out what division our honey belongs in that year, and making sure we have the equipment we need to make our entries.