I was just gearing up to do a cleanout this weekend!

I do the trick that I learnt somewhere but can't remember now; you put all the hangers in the wardrobe the wrong way and then when you take it off, wear it and wash it, it gets put back in the right way. At the end of the designated period any piece of clothing that hasn't made the hanger switch moves on... obviously have to allow for seasonal things and such but works pretty well for me, has definitely made me really think about my purchases and make sure things are complimentary.