I've toyed with the idea of a capsule wardrobe for years but it always gets messed up somewhere along the line, or I have a disorganised week and nothing is washed and I end up with no clothes or it works for a little while then items look old / worn out.
So, those of you who make it work, what are the key principles you've adopted?
Is it a certain number of interchangeable items? One in/One out? How often do you buy and do you a whole wardrobe haul at once? What's the main benefits? Do you still buy pieces that don't 'fit' your capsule just cause you like them?