Lighthearted thread, here!
DS (nearly 3) and 4 month old DD. I care WAY less about what other mums are doing second time around.. I felt so awful that my DS didn't sleep through the night (until he was 2!) and spent many a night reading sleep books and using sleep consultants. This baby also not a unicorn and does not (and should not) sleep through, but I'm much more relaxed. I also bring her into bed with me which I never did with DS, fearing "bad habits".
I also have not done any baby groups with DD. I found them so stressful with DS.
I also protect my time better this time around - I say no if I don't want to do something (meeting friend/family) and make sure I have a hot bath and a nice dinner every evening so I'm not a shell of a human.
So, what about you mumsnet? What have you done differently 2nd time around?