I was having a really down day yesterday. You lot have helped me put it all in perspective again! Thank you.
The only thing I know about Jo Frost is her controlled crying technique because of the thread in Sleep. I suppose we are edging closer towards doing it, as DD hasn't slept for more than two hours at a time since birth, and I am beyond exhausted. Please don't flame me! (If anyone has any other magic solution, I am all ears!!) But I shall have a look for her books on Amazon.
Teacher, I'm glad someone else's baby does that! It cracks me up :) I think a playpen may well be a good investment.
Your MIL, QT, sounds interesting! When families are made up of different cultures it makes for very lively parenting discussions, I've found especially when PIL don't know when to butt out. Yes, I generally find the Germans I know to be much more direct in what they say, whether supportive or not. They DH find me too wishy-washy sometimes with my endless English apologies and polite roundabout way of asking someone if they had ever possibly thought about maybe doing something slightly differently if it wasn't too much trouble 
So, DH and I had a good conversation today about impulses and lack of control, and we are now on the same page for how we're going to deal with DD ... We're going back to how we were instinctively dealing with it before everyone PIL came along and told us we needed to be stricter!
A stern no the first time she does something, then removing and plonking elsewhere with distraction when she does it again. And not panicking that we will have a little terror on our hands when she doesn't immediately do what we say.
Today I decided not to care if she threw her food on the floor, and you know what, mealtimes were so much less stressful. And she ate loads!
And in terms of safety, we've pretty much got it covered except for the loo and the bin, which aren't dangerous, just unhygienic. A bit of extra cleaning won't hurt.
I'm 27, and although most people would probably think me quite confident, I have lots of issues around trusting my own judgement. But I think that I was probably doing things ok before I let other people influence me. Thanks for helping me see that! Gawd, I sound like such a sap ...