I have to pass on this gem I recently discovered: The Declutter Calendar. This is awesome! It breaks things down into very doable parts (and if you miss a day, don't worry about it, just pick up with the next day). Every day there is some small task to do, such as sort through your spices, throw away expired medicines, or clear off the top of your night stand.
You can print off the calendars a month at a time, or print the whole year.