One thing I can sometimes get away with is going shopping after I drop Josie off at school. Natalie will often fall asleep in the car, and I can just run errand after errand. When I get home, I take out the car seat carrier (and I had a neighbor who would take out the whole CAR SEAT when her DD outgrew the carrier! :shock:) and then re-install when it's time to get Josie if Nat's still asleep.
In the mornings, though, it totally sux when she wakes up at the wrong time. Best time for her to waken is 7:15-7:30, so I can put her down for a nap when we get home and if she sleeps more than 45 minutes I have almost the whole AM to myself. Then she wakens, I nurse her, play with her for a while if we have time, and we go get Josie. When she wakes at 6, though, she'll go down for a nap at 7:30 or 8:00 and if she sleeps long I have to wake her to take J to school. At least it's only a 10-minute round trip. And when Nat doesn't sleep much during school, then she naps while Josie has Quiet Time and I get my break then. As long as I have one, I cope with the crazy sleep schedule as best I can.
Is this any help?