Nothing.
For the amount that we put in, should not yield what we have.
But I will tell you what we did.
First, we swaddled. Tight. I mean TIGHT. My girls looked like little burritos with heads sticking out. I'm not kidding.
Paci's. Some say do it some say don't. We did for both girls. AB loved her all the time. EK used it for it's purpose and would spit it out. We just got rid of them a few months ago.
Bedtime routine. When they were little (newborn, not sleeping through the night), we still did a bed time routine. We decided that 8pm would be bedtime and 8am would be our wake time. Before then, around 7 or so, we would do a feeding, give them a bath, read a story and have prayer time as a family. So anytime that they would wake up between 8 and 8, we would do what baby wise calls a "dream feed". It's a no non-sense feed. No snuggling, no eye contact - just feeding and back to bed. Some may say, you don't want to snuggle your baby? You don't want to soak up this time? No. For me, there is 12 other hours in the day to do that. In addition, I'm a monster when I'm sleep deprived. I'm super emotional, short tempered and mean. My other family members do not need to suffer.
Also, for 6 weeks, I would feed around the clock, working toward a 3 hour schedule. Meaning, of course I'll feed my child when they are hungry, but trying to get them eating every 3 hours so that I can nap, play with the other child, take a nap myself, shower, sit and
Grace. Give yourself some grace. They do not come out of the womb knowing the difference between day and night, you need to teach them. Give yourself some grace. Your tired, hormonal, and need some coffee but if you are like me your so worried about your milk supply that you don't. Have a cup and get over it. At least you can have an attitude adjustment.
Patience. It did take some time and a whole lot of patience. But we got them sleeping.
Do they still wake up at night, yeah. Do they still protest, sometimes.
But I hope that this helps someone.