Yeah had my 3rd 2 months into dd1s first term at school.
So my tips are: don't include baby in routine until at least to 8 weeks old. Then don't try to stick to it rigorously.
I usually feed baby and change his nappy about 6.30am then get up at 7 to make teas and choccy milks for me, DH, DD1 and DD2. We have drinks and a story in bed, then get dressed by 7.50am. Breakfast 8 to 8.30am. I don't usually wash up, jsut clear table.
Then lots of yelling about brushing teeth, hair, shoes, pack lunch, book bag etc. I bundle baby in pram still in his sleeping bag. This usually works well as he drops off on way to school at 8.45am and that is his morning nap.
The MAJOR tip is make sure baby is fed before you embark on activity with the older ones! When baby is tired just put straight into pram - he will get used to falling asleep on his own.
My 3rd is just the easiest sweetest little thing, so easy going. 4 months now and it is a doddle.
My DH works from home but I still do it all in the mornings - it is easier other wise he soes stuf in diff order or slows things up. He does often clear up breakfast things while I am out with the others which is quite sweet I think.
The first 6 weeks though he got the girls up for me and I took over at 8.30am -m it was SUCH luxury. I fed babe then had a leisurly shower.... no more though