When my kids were 6 months I would try the 'let them cry themselves to sleep' but listening to them cry often made me so stressed out and anxious I would cry! For me, I found cuddling/rocking/feeding to sleep worked for me and my babies. As they say in the article, all babies are different. Different techniques will work for different people and at different stages.

I think these people writing these stories need to be careful incase it affects an already vulnerable mother.