L.A.
I like to do it at the start of each season. Its like spring cleaning 4x over. My top tip for organizing is, touch it once. decide right then and there if its a keep, recycle or trash item, otherwise, all you are doing is moving stuff around. Also, if you generally de-clutter, it makes all the cleaning/ org tips easier. finally, you can always motivate to do one seldom done job a day, clean out the kitchen "gadget drawer", make sure you've got old fliers off the bulliten board, take an inventory of your wrapping/paper supplies. etc. if you do one of those seldom done jobs a day, you will really get ahead of the curve.