You just reminded me to go do planks. I can hold for about 15 seconds at a time now =P Gotta start somewhere!
When I got blood work done earlier this year and found that my cortisol levels were a bit off in the morning, I had to work REALLY hard to get myself to go to bed earlier. I ended up doing it in 1/2 hr increments after quitting my evening gaming. Back to 11:30, then 11, now 10:30. I can go to bed anywhere between 9:30 and 10:30 now and usually fall asleep pretty easily (as long as it's not too hot, sad to say I can't sleep without the AC now) and wake up 8-9 hours later. I imagine with kids this gets a bit more difficult, but you will feel better!