Stop what you're doing and get up...or actually, get down on the ground. No matter what you have going on today, at some point you need to do the Mandatory Monday Move: the plank. Maybe see how long you can hold it, or see how many times you can do it until you just can't do it anymore. Try it, decide you hate it, maybe try it one more time for good measure. Just do it because it's mandatory!
How long can you hold the plank?