I'm a firm believer in sleep training, though I know it's not the right solution for every family. I also know there are a ton of different strategies for sleep training. For my partner and I, sleep training meant teaching our daughter to soothe herself to sleep and, for a short period of time, that meant crying it out. It was not my favorite time, but because my partner did the things every grown-ass man does when you're crying it out, we got through it together.
Crying it out isn't the best plan for every child, but my husband and I learned very quickly (and when our daughter was very tiny) that very little was going to soothe her if she was ready for a nap or overtired. Instead, our soothing often wound her up even more, getting her frenzied and overtired instead of sleepy. She had serious FOMO and the idea that anyone else was going to be awake meant she was not going down without a fight.
Rocking, shushing, going for a walk; all the typical soothing things were overstimulating for her. So instead, we chose to let her cry it out. In the process of doing so, we realized we could facilitate little tricks for helping her soothe herself, like rubbing a blanket on her cheek and having the room totally dark.
I was grateful for my partner in sleep training, and his steady, calm presence throughout the entire process. Sometimes (read: always) the thing you need to do, isn't always the easiest thing, which is why a steady and supportive partnership is so important when your goal sit to finally sleep. With that in mind, and if you're gearing up to try sleep training yourself, make sure your partner does the following things: