I am very much a go with your gut, trial and error Mum.
I think it is so important to be relaxed and trust to yourself as well. Miss P certainly is better off for it and while she doesnt have a routine we are kinda in a pattern.
She is still sleeping wonderfully overnight but that lead up to bedtime is basically constant feeding. From about 7pm till usually 8.30 - 9pm when she finally drops off but then she sleeps through till 5am. And man its cold at that time. Not nice having your boobs out when its bloody freezing!

I went to see a friend today who has a two week old and Peppar looked like a toddler compared to her. There is 8 weeks between them and man what a difference. Mind you in a few months I dont think the difference will be quite so noticable.