Breaking bad habits

Sienna was sleeping with us for almost 4 months and we tried breaking her of it at 2 months but was too young to understand what we were doing, so she cried the whole night. The Doctor reccomended us to wait until she was 4 months, so one night she kept me up the entire night just wanting to play and so I decided to finally bight the bullet and break her bad habit of sleeping with us. Since Sienna has acid reflux, she needs to sleep on an incline, so her carseat was perfect for that. I wrapped her up in a blanket and gave her a stuffed bunny (thank you Tia Liz) and let her cry herself to sleep. She cried for about 15 minutes and then fell right to sleep. I think that we chose a good day to start breaking her of it. Now she sleeps GREAT by herself! But not without her bunny and blanket.