DD is 15m and has had the same routine since about 12m:
Get up when ready - normally 7ish.
BF then Breakfast, in highchair and eating by 8.
Wash Dressed and playing until 10/10.30.
BF and Nap - this started as 45 mins and is now 1.5 hours average (as she dropped pm nap)
Wake up, bit more BF, play while I make Lunch.
After Lunch we go out, Town or Play group - anything that is stimulating. If we stay at home she gets Grumpy by 3.30 and she wants to sleep which throws out the night time.
Get home and have tea by 5.30pm.
After Tea she has a calmer time. A cartoon and a book or two. Chats to Granny on the Phone, plays with Daddy etc.
Bath and bed between 7 and 8pm.
She has just started sleeping through consistantly. I put this down to me keeping her going in the afternoon. If she gets tired she has a bit of milk or a snack and it perks her up. I think they just run out of energy mid afternoon and it can be mistaken for tiredness when they really could just do with a boost.
I have followed her lead in all this so it is not a strict routine more what she has told me she wants and that has changed gradually over time. The afternoon naps dropped off really gradually and depended so much on what we were doing at the time.
She does go to Nursery a few days a week and that has helped as the room she is in only allow for one nap (although if they are obviously tired they will put them back down).
Remember they are all different so give some new things a try and see what happens