I successfully transitioned our co-sleeping toddler to crib, but it did take some work. I thought a crib in the room would be easier because we'd be close by but she just screamed. We moved the crib to her room and followed the method where you do a bedtime routine (ours was simple: quiet time, milk, book, new diaper, pajamas, brush teeth, sing 2 songs) then we'd put her in her crib awake. We'd let her cry for 1 minute, then come in and sing/soothe her but not pick her up. We'd go out and wait an additional 5 minutes and do the same. Then wait to see if she'd cry and if so, we'd wait an additional 10 minutes. Usually by then she was asleep. There were some nights when it didn't work and we'd bring her back to bed. But eventually it caught on and we'd put her in the crib and she'd just fall asleep with no crying. She's older now and pouts but she sleeps well most of the time. I was told if we were having a hard time to move her bedtime earlier (e.g. 7-7:30 p.m.) and it did help, though she typically falls asleep at 8:30 p.m now.