B..
Maybe, I'm backwards....I didn't do a lot to get him to sleep. My fear, was he would always need a certain temperature, white noise, whatever else. I really wanted him to be able to adapt, and sleep well in any situation. I used to vacuum in the same room he was sleeping as a baby. I didn't avoid noise.
I realize that many babies do need a little more to be comfortable. This is just what worked for us. He can sleep anywhere, anytime.