First you need to weed eat through all the stuff and get rid of things you never use (like the board games, stuffed animals etc. if you do not use them). Then get everything you are going to keep in order. Find a home for them, and lable their home. Take for example, towels, under the bath room sink, put a lable on the doors so it can not be seen from the out side, but when you open it up, you can remeber where to put them. Clean the items, get the dust off them, wash any type of linnes, clothes, pillows, etc. Then go to walmart and get those bags where you suck the air out of them. Put your beach towels, extra pillows/bed linens, seasonal clothes youa re not using in them, suck the air out with your vacume, they hardly take up any space with out the air. Then store them. Other non soft items, put in larger plastic containers, lable those and put them in the closets. they are easy to stack and by labling them, you can get to what you need in a hurry. Also get those long flat storage bins with wheels that can go under a bed, crid, coutch, love seat, or anything else that there is a 1/2 foot gap between the floor. Get Decor items like baskets with lids that can hide the storage but still look sheek. Once everything has a home, then get to working on the cleaning. Scrud your kicten top to bottom, with a 50/50 bleach to water. As well as your bathrooms. Dust all other things taht can not be cleaned with sprays with a swiffer wipe, traps dust like you would believe. If you got cob webs, use a swiffer sweeper and get up there and get those down! Get all out clothes put away on hangers and folded put away in your dresser. vaccum all floors very well, and hit your base boards (major dust traps) , mop your hard floors with bleah water(unless they are wood in that case, use very hot water to kill off the bacteria) Then rent a shampooer for your carpet. Go over all floors twice!! After you have done all the heavy duty cleaning, buy products that are quick and can clean. Like a swiffer sweeper, and wet mop, lysol wipes (for cleaning kicten and bathrooms) toliet wands that you just throw away, tub wands that you throw away after use, clean every week. Then once a month, do the heavy duty cleaning. I know it is hard to get movtivated, but tell your self if you get it done, you will buy a reward and just keep that reward in your mind while cleaning. best of luck!