someone here had posted a great idea:
Going one room at a time, empty out EVERYTHING and take it our of the room. Carefully sort through it and only bring back into the room things that you truly love and use. And stop if you find that there is no longer an appropriate place for the things you are bringing back.
So for the kitchen, empty out all the cabinets and clear all the countertops and spread it all out in the living room. One by one, choose the pieces you use daily. Anything you haven't used in the past few months, either get rid of it, or store it for a few months (dating it) and if you don't have to go retrieve it, then it's safe to get rid of.
The most important part of this technique, I think, is that as you return things, you find a home for that object, and that object alone. Everything needs to have its own space reserved in your house, and it needs to be in the most sensical space as well- where it is used and easily accessed. With this, cleaning is easy because you know exactly where to put everything and you don't accumulate piles of "where the heck should I cram this" stuff.
And before you look into storing, do all your purging/decluttering. There's no need to figure out organization/storage for something you no longer own!