I'm trying to move Esme to 1 nap. We get up at 7-8am, she used to nap 11-12 then 4-5 but recently she's not tired until 9pm if she sleeps twice (and bedtime is 8pm at LATEST so this is not handy...). I'm currently letting her lay a little later in the morning (she never cries and if i ignore he initial "i'm awake" chatting she nods off again after 5 minutes) getting her up closer to 8 (i LOVE lying in!) and keeping her awake until after lunch. she sleeps 2 - 2.5 hours if i do it this way. But as you say, it's not the same everyday... LOL.
H