You may have some furniture kicking around that has seen better days. Freshen it up with a coat of paint in a bright color! Here are a few bold choices:
- General Paints, Squill, CL 1995D (Green)
- Benjamin Moore, Rhubarb, 2007-30 (Pink)
- Benjamin Moore, Gold Mine, 2155-20 (Orange)
I like to keep things interesting and change some item's out in my home seasonal. I change out sticks for grasses and dark fabrics for colorful ones. Add some new colorful pillows to your sofa:

These flirty plates will add a pop of color to any solid dish set you may have

A pair of these by your front door or garage would make a stunning feature. Add plants of varying colors, textures and heights to keep things interesting

http://www.eighteenkarat.com/volcanic-taper-planter-31-5-3605.html