The initial idioms of the letter N

Nothing doing!	nothing down
nothing for it	Nothing for me, thanks
nothing if not	Nothing is certain but death and taxes
Nothing is certain but the unforeseen	Nothing is given so freely as advice
nothing is so good for the inside of a man as the	nothing less than
nothing like	nothing much
nothing new under the sun	nothing of the kind
out of the ordinary	Nothing so bad but might have been worse
nothing special	Nothing succeeds like success
nothing to be sneezed at	nothing to be sniffed at
nothing to boast about	nothing to choose from
nothing to do with	nothing to it
Nothing to it!	nothing to it, there's
nothing to sneeze at	nothing to sniff at
nothing to speak of	nothing to write home about