Assuming I'm correct about my gender, I'd probably get up and go to the bathroom like I usually do and then otherwise go about my day, because my gender is already correct.
Now if I were to wake up to a world where gender norms suddenly went away, I'd probably not pick up on it immediately (I'd have to walk out the door and see some people, and it might take a while given that women right now aren't all that girly looking, never mind the men pre- or post- norm-removal), I'll make adjustments accordingly. Mainly this will mean wearing dresses more in my day-to-day life and maybe painting my finger nails. Maybe I'll get rid of my suits, but I don't really have an alternative for conducting interviews and such.