Accents are brightly-colored pieces of art or furniture that give life to the room. They are called accents because they draw attention.
You wouldn’t want to have too much stuff drawing your attention if you want your space to be minimalist. Instead of having too many decorations, stick to one or two that really stand out.
This also touches upon point #1 where you should just find a couple decorations that you love and will appreciate every time you look their way.