Back into the crib?
An alarm on the door so you'll know she's walked out?
Take all of the toys and other playthings out of her room, tuck her in and if she falls asleep on the floor, oh well?
When you do take her back to bed, do not talk to her, do not remind her or scold her. Simply lead her back to bed, tuck her in, and leave. Not even a kiss - you already gave her her good night kiss. If she is old enough to understand, a sticker reward in the morning for staying in bed all night. Earn stickers for a small treat.
And do not let her get overtired. Don't take her nap away in the hopes that she will sleep better and deeper at night. The opposite is true. Overtired kids have a harder time falling asleep, staying asleep, and are more likely to wake earlier in the morning. And as the days go by, it gets worse. If she is already overtired, move her bedtime UP by 1/2 hour to an hour until she is caught up.
at 3:53 PM on Feb. 11, 2009