my DD is 13 months and i am in the same boat as you atm. Some days she is so tired by 9am and others she tends to be able to go all the way through till after lunch - we are still working out the kinks - other days she has 2 sleeps - i just kind of gauge it on how she is coping that day.

I agree with Kiwimummy - falling asleep in the car is the big killer. Today i visited a friend and DD missed her morning sleep. She then fell asleep in the car for the 45 min drive home and then wouldn't have a sleep in the arvo. I still leave her in her cot for about an hour though to 'rest'. She doesn't get upset just lays in there talking to her bears, so i figure it's better than nothing. On the days she doesn't have a proper sleep though, i do tend to give her dinner earlier and have her in bed by 6.30 otherwise she is a nightmare!

Soooo in saying all that! I am just tending to go with the flow for the time being as she is still in the transition mode and will work it out - i just sort of think that DD is just like me in the sense that some days she will just be more tired than others so she will sleep more on those days IYKWIM...

good luck! xo