Want to make some long-term design changes and do it when you get home from work?
(1) Re-arrange a room. You can change the look and feel of your space by moving the furniture to different positions. Re-purpose pieces that are unused in one room - like small dressers and chests - and place in the 'new' room. Don't forget that function is more important than style so don't block walkways! You can even do it on line first with Better Homes & Gardens.
(2) Paint an accent wall. A 10 x 10 wall should take about one hour to roll on new color. Select a color from your furniture or accessories to complement your existing decor. Choose that wall wisely since an accent wall should not be broken up by windows or doorways or the impact will be less. Can't do a full wall? Try a stencil around the perimeter or simply around the canopy of your light fixture.
(3) Update the flooring with an area rug. It's OK to place a decorative rug on carpet (especially worn and dated carpet). Change the area rugs you have from one room to another for a new look. Stop off at your local discount home store or IKEA for an inexpensive one. Area rugs are especially good for large rooms, to section off seating groups or functional areas.
(4) Change your art. Add a mirror, create a 'pair' of pieces, re-arrange one wall with a vignette of photos or art rather than one or two large ones. Buy some new art and frames at www.art.com or make your own with decoupage, paints and even fabrics!