I should preface this by saying that i don't have a big house. Just a standard 3 bedroom.
But I feel like I am constantly putting things away, rearranging stuff to find new inventive ways to fit things in and in general trying to keep clutter to a minimum. Of course my dd is a huge contributor to the problem. I sometimes feel like things breed and multiply in her room!! 
I did a quick post Christmas Day tidy up today and already have a bag of stuff to take to the charity shop (to make room for new things).
If you don't have a huge house with masses of storage, how do you cope?