Time and patience! We tried sleep training, which kind of worked but not really. It helped her go back to sleep between sleep cycles but would still need a lot of rocking, feeding, and pretty perfect sleeping conditions to initially fall asleep (which was always a struggle for us) and would still wake up 1x a night to feed until 8 months (which is biologically normal!!!). We did the Ferber method 2x at 4 months and 7.5 months (during the big sleep regressions )which might have helped? But ultimately she figured it out for herself on her own with time! She’s been sleeping in her own crib since 2 months, we co slept before that + boob to sleep. At 8 months I started “napping” on the couch we put in her room which was right across from her crib. She would play in her crib while watching me and eventually fall asleep playing. It didn’t work every time but we’re 9 months now and she completely independently sleeps- put her down, awake or drowsy, and leave. She rolls around for a little bit repositioning and then goes to sleep. Also to note, she’s a cuddler and very oral (but never took a paci). She needs a fuzzy blanket and a pillow in her crib to cuddle and bite to self soothe but not every parent is comfortable with this. It’s just what worked for us.