My baby is two months old and the health visitor said that by three months it's a good idea to put her down to sleep drowsy but awake so that she learns to self soothe and will sleep better. She currently wakes after 1-2 hours sleep throughout the night so I am very up for an improvement in that regard!
I'm really interested to hear other people's experiences of how/when they've gone about this so please share your words of wisdom!