It used to be that your baby was to be positioned on their tummy; now it's their back. The time frame in which solids are introduced changes as well.
I think the key thing is to research. You have to know and understand the professionals. Will you agree with everything you read? NOPE!
Of course you get A LOT of opinions. Some wanted, some not wanted.
I have a family with a Grandma that was a nurse, a Mom that was a nurse, 3 Aunts that are nurses, a sister that is a nurse and 2 cousin's that are nurses. Needless to say there are a lot of opinions in my family. Even when I breastfed, my Mom and one Sister were very supportive, while the others weren't as much. Hard to believe that any nurse wouldn't be supportive of that. It is true that some are not. Usually because they never breastfed themselves, or tried it and were unsuccessful.
The "Cry it Out" sleep technique is now under the fire!
You can read a whole article on this topic here. Please read it!
I always felt uncomfortable letting my kiddo's cry and cry some more. It's one thing to let them cry for 15 minutes. There are times where I tried everything and it seemed nothing would calm my little one down. Usually I'd find out later that it was a tooth coming through or a nasty ear infection. Twice, if I would have waited to attend my babies, they would have been closer to death. When my youngest, Isaak had meningitis we acted quickly. We were told that, if we would have waited to get him in the emergency room, that would have been very bad for our 2 month old! My Father was the one who acted quick in regards to our oldest having a staph infection. He noticed Mica's neck getting large. I'm so glad he noticed that! If he was in a daycare, it might of gone unnoticed.
Some parents let their kids cry for hours. They believe in self soothing. That is what many articles talked about just a few years ago. The articles mentioned that if you picked your child up, that was spoiling them.
Think of it this way: Your baby has no way of communicating except for crying when something is wrong. There is no such thing as spoiling a newborn. As they get older, sure you should let them cry in their crib, but not for long periods of time.
Listen to your instinct.
Remember that your baby's only way of communicating to you that something is wrong is to cry.