When did you start sleep training?

Katie

My little one is sleeping through the night (8-10 hours at a time). Very happy about that but it is getting increasingly more difficult to put him to sleep for naps and bedtime because he knows when I put him down. My husband and I are going to sleep train him around 4 months (per our peds recommendation) and he has a couple more weeks to go but I’m starting to wonder if we should just sleep train him a little earlier. Has anyone else had any luck with this?