Do you have a favorite home style? If not, The Wall Street Journal's Leigh Kamping-Carder and Dana Kien, may be able to help you. The writers break down 15 styles and encourage readers to vote for their favorite.
For those who don't like clutter, there probably isn't a need to go beyond the second style on the list--minimalist.
Simplify. Take the paintings off the walls, the hardware off the cabinets, the tchotchkes off the shelves. Invest in unfussy pieces in neutral colors. Not everyone will be a fan, but perhaps your psyche will benefit from a dose of minimalism.