Nice thought. Usually, when people talk about minimalism, they talk about minimalism in the area of material possessions - which is something I already practice, because, beside reducing clutter it also saves money (all the things I don't need to buy!).

Recently, I've read (listened to) the book by Sarah Knight "The Life-Changing Magic of Not Giving a... ", well, you probably know what. It basically talks about decluttering in your mental space, specifically your perceived obligations to people around you and society in general, without being rude and/or unpleasant person to deal with.