When you consider redecorating, take time to study each room carefully. What is the purpose or fuction of the room? A place to relax? A playroom? A mancave? A place to gather with friends?
Then, consider the features of the room. Does it have a fireplace, or a bay window, or perhaps built-in shelves?
Redecorating could be as simple as re-arranging furniture, adding accent pillows or slipcovers for tired furniture. Consider wall color. If it is meant to be a calm space, stay away from reds and yellows - go for greens and blues. Robin's Nest from Benjamin Moore, Grass Cloth from Behr or Fresh Water from TrueValue Paint are good hues for a relaxed space.
Party rooms need a little more "pop". Consider Broadway Lights from Benjamin Moore, Exotic Sea from Valspar or Scrumptious from Olympic.
For built-in shelves, call them out without screaming. No contrasting color, please. Painting them the same color as the walls would be too quiet. A couple of shades darker than the walls is pitch-perfect.
There is such a thing as too many colors. If the eye has nowhere to rest, you have too many colors and you need to edit.
Often small changes in color, accents and placement of furniture and other decorative pieces can make a big difference.
Be brave and try things out. Breathing new life into old spaces need not be an expensive exercise!