DS is 2.5 and has been dropping his sleep since about christmas time. More often than not, he won't have a sleep. We don't mind, cos if he has a sleep, then he won't go to sleep until about 9 or 9.30 at night.
We just trialled it for a few days, then let him have a nap, then the next day not have a nap. It was hard in the beginning but he got used to it, and now it is rare that he has a day nap. His sister will probably drop hers early too cos she's already only having one nap during the day - and he was 14 months before he did that to me!!
lol