DD went to one sleep at around 12mths - this is what we do!

6:30am/7:30am - up
7:30/8am - breakfast
10am - snack
11am/12pm - lunch then sleep (she sleeps anywhere between 1.5-3hrs)
wake up - snack
5pm - dinner
6pm - bath & milk/story
7pm/7:30pm - bedtime

HTH