We had to wait until Kaya was comfortable going to sleep in her own room. She got there at about 9 months, she now starts the night in her own bed until we go to bed (she comes in with us the next time she wakes up). I'd say it's all about routine, kaya gets - teeth brushed, face washed, nappy changed, jammies on then a feed and cuddle until she's almost asleep, then put down in bed and wait until she falls asleep. If she fights it, I don't push it for any longer than 45 minutes then give in (went through loads of battles at 7 months before realising she wasn't ready) and start again the next night.