I'm in college an finishing high school. I have very early mornings an very late nights. What do you busy ppl do?
Pretty anything and everything I can:
If I'm walking between classes, I'll pick up my pace and go the long way around. If you can, jog or power walk bits of it. That will burn more kcals and give your metabolism a small boost.
On the way to uni/work, I'll get off a few stops early and walk.
I tend to do high intensity short duration workouts at the start or end of the day. Things like Summer Abs or Grind Hard. They don't take much time but are worth every second. Use the browse/filter option to find others which suit your needs. If you have weights, you can do rounds of small reps for 5 minutes to work areas which you think aren't covered by exercises on skimble.