By Being Consistent
The key is to do the same exact "thing", at the same time, in the same place, every single night! it does not have to be very elaborate either. It can a be a 3 minute routine consisting of turning down the light, singing/putting on the same lullaby, massaging your baby or scratching
his/her head and down in the bassinet you go.
Or....It can be 43 minute elaborate calming spa! just be persistent!