Creating space in your home (or office) is essential in order to have space in your mind. How can you breathe freely in a crammed house?
Clean out all the clothes you have not used for a year, get rid of unnecessary decoration objects, books you don't want to re-read, and empty glass jars or other "might come in handy" stuff. Enjoy getting some empty shelves, some room in your closets, drawers and wardrobes. Let in fresh air!
And then the challenge is NOT to fill up the space again.