We stopped cutting the lawn, vacuuming, doing laundry, doing dishes...pretty soon we're going to stop showering to save even more time.
Seriously, the biggest time saver we have is in food prep. We only cook once a week, on Sunday. We cook enough to last from Sunday-Thursday dinners for everyone. So Mon-Thur we only need to heat and eat. Same for the kids lunches when school is in. On Sunday, we make sandwiches for the week and make about 20 snack bags. On a school morning, we just grab a sandwich, a snack bag, a piece of fruit from the fridge and a bottled water...takes 2 minutes or less. I do the same for my stuff. I prep a weeks worth of protein shake powder, breakfast, lunch and afternoon snacks so I never have to do it after work and it only takes me a minute to pack for the day.
Yes, that makes for a busy Sunday morning (the whole thing takes about 60 minutes with DW and I working together) and a lot of dishes to wash Sunday night, but it's an invaluable time saver during the week when our schedule is out of control busy.