Last night we were at the end of our rope. So we started sleep training. I would let DD fuss and then cry until she was obviously worked up, then I went in, picked her up, calmed her down, and put her in her crib again. I had to do this 2 more times. The third time I did this she quickly went to sleep after I put her down.
First nap today, 15 min of crying followed by a 45 min nap
Second nap, 10 min of playing with her crib toy, 5 min of crying, followed by a 45 min nap
Third nap, 5 sec of crying and a 45 min nap.
Down for the night with no crying.
I remember when DD1 initiated sleep training. She actually wanted us to put her down. She would cry worse when we held her. It is so liberating to just lay the baby down and they go to sleep. There's no drawn out ritual. It really is amazing! DD1 is loving having me to herself again too. It's a win win all around!
ETA: if she was a good sleeper we wouldn't have done it, but her sleep both at night and during the day has been getting worse and worse. She has become an overtired mess who will only sleep on us most of the time and she sleeps fitfully on us.