J.W.
It's going to take some time and she's going to be going thru a big adjustment sharing her momma, so be prepared for some very sleepless days. Go to build a bear or another store and let her pick out a teddy bear or other stuffed animal to be her new snuggle buddy. If you go to Build a Bear, let her pick out the pj's or blanket to go with it. Now, when you get home, the only place the snuggle buddy can sleep with her is in her crib. You may have to rock her to sleep before you put her there, but that is a first step. Easy and convienent are not words used to describe parenting, so regardless of what you want, this is reality. Also when the new baby comes, you're still going to need to spend that kind of time with your toddler. Now that you have her sleeping in her crib with her snuggle buddy, you can start the self-napping part. This is where you put her down and while she's snuggling up to her bear under their blanket, read a story or sing a song. It's quiet time. You can use this time to nurse/feed the new baby before you put the baby to sleep in the bassinet. It's a good idea to keep the noise level normal with the new baby so she becomes accustomed to the sounds, she won't be startled by the ordinary sounds of living, she'll learn to sleep thru the household noises. As time goes on, your big girl will learn to self soothe and go to sleep in a quiet room. You will be crunched for time for the next 2-3 years, but it will be a wonderful time for all 4 of you!!! Congrats!!!