Think about what you would do in emergency (eg. leaving children with someone else?, getting out of house in case of fire?)
You may be asked what safety stuff you have in place in any given room - can just say what you have done to ensure safety. You don't have to show each and every safety feature, just be verbally able to say, for instance, "I'll have a stairgate here, there's safety plugs here, my car seats will be brand new, I always use reins/wrist-straps, I will always check toys and equipment for signs of damage etc."
As well as multi-cultural stuff, they are very keen on disability issues (something which can be very hard to "reflect" in your normal working day - you can get some brilliant fiction children's books via NCMA/Amazon).
This all sounds really serious and rather daunting, and I am beginning to worry myself about my next inspection! It really won't be that bad, your inspector IS human (I read it somewhere!), so put the kettle on and just have a chat!!