How do you get rid of a big nose?

Not at all. People can sometimes judge their noses as if it has to be a perfect shape - what ever 'perfect' is, there really is no definition for perfect. Most likely the nose you have is perfect and perfect for your face.

I wouldn't see the hurry of wanting a smaller nose.

If you were to ask someone "what is bad about having a big nose", what could they say? Nothing! Argument won! It is a nose as any other, and they all function the same.