^Yup it's great not having half full bottles of things lying around. And also, even though I regularly throw things away I no longer want to use, there's always things I hold on to because I "might" want to use later. Now that I've forced myself to use them for the sake of finishing them, it's much easier for me to be less sentimental about keeping things. Does that make sense?
If I find I don't like something, chances are I won't like it in a month...so make space for something better.