Grab a yard of your favorite fabric and a few different size canvas and staple.
These homemade, multi-purpose laundry storage shelves streamline chores and tidying. From Being Brook via Apartment Therapy. Could work with orange and yellow.
For Master Bath - To add a little interest to the plain walls, add some 1" by 4" boards to one wall. Adds a little architecture to the room...a coastal cottage feel, no? :) Just glue and nail gun the boards on the wall (easy), then paint everything (possibly a cool white, like Dunn Edwards, Swiss Coffee) to expand, lighten, and freshen-up a small, windowless space.
Since I am tackling my garage tomorrow...I need this! 49 Garage Organization Tips, Ideas and DIY Projects