Sleep training sounds so scary, but really it runs the gamut from controversial "crying it out" to shushing and patting your baby until they fall asleep, or even creating the elements necessary for them to have a regular nap schedule. However, no matter what method of sleep training you've chosen, using these sleep training habits will prove you've got this and are ready for everyone in your house to be sleeping peacefully.
With our daughter, we chose to let her cry it out but we coupled that with a well-timed schedule that would enable her to fall asleep without even needing to cry. We also went that route because she's the kind of baby who needs to get to sleep on her own. No amount of rocking or shushing was going to get her to sleep. In fact, we quickly realized that black out curtains were a must because we've never seen a baby with more FOMO. To her, any hint of light was a party she was missing.
We've also cared for several foster babies and managed to get them sleep trained in a matter of weeks. The key for us was to make sure we were watching closely for sleep cues, and to wean them slowly from some of their sleep crutches. We had one foster baby who arrived to us only able to fall asleep with a giant bottle. We slowly shifted her to taking a bottle and letting her get drowsy but not asleep before we put her in the crib. After a while, we started shifting the bottle back from nap time so the two weren't always connected for her.
So many people view sleep training as militant, but we treated it a little more like yoga: slowly bending incrementally until the baby was practically saying namaste on her way to dreamland.