I'm not sure if I'm doing anything differently, but Mari seems to finally be learning to nap. Lately we have had fewer and fewer 30-45 minute naps, which used to be our curse. I used to always have to try to rush in and put her back to sleep, but that was hit and miss. More than half the time I wouldn't be able to get her back down and she'd be cranky from not having slept enough.
Today, very unusually, she had two naps of more than two hours each. This is well-nigh unheard-of. I don't expect this to become a pattern, but certainly she has been napping for more than an hour at a stretch more consistently. And except for today, when she went down at 7:50, her usual bedtime of about 7:30 and wake time of about 6:30 (well, between 6:00 and 7:00 a.m.) hasn't been affected by her napping better. She's just in a better mood more often. Yay!
What's more, Mari slept ALL the way through the night last night -- 11.5 hours. Double yay!