I'm not sure to be honest. I'm absolutely uncomfortable with the idea of 'teaching' a bub to self settle If it involves leaving them to cry or being otherwise unresponsive but I do believe some babies do it without prompting. Most of the time I feed, rock, sing my little one to sleep etc but other times if he is clean, fed & tired he will fall asleep lying in his swing naturally by his self. It's a really sweet thing to watch, he's just really relaxed and sleepy during those times I guess. At 4 weeks although heartbreakingly exhausting I think it is completely normal for Bubs to require help to settle, I'm of the feeling that the first month is like the 4th trimester with bubby slowly adjusting to the world around them.at least for me it helps not to perceive their sleeping habits during the early weeks as a problem but rather just the unfortunate way it is, like the sun feeling too hot on a summers day. That's not to say it isn't a rude shock though! I'm a second time mum and still shattered by the sleep deprivation!