In a rush but one hint i have heard it to sort all the "keep in case" clothes up one end of your closest with the hanger facing a different direction to the stuff you wear all the time, then as you wear it, it goes to the side where your other things go - if the stuff is still up that end turned the other way in 6mths - 1 yr etc. then it goes to the oppy.

Maybe get some tubs to sort things into - one day per room sounds alot to me if you are decluttering with kids underfoot to be honest! I would give yourself enough time that it takes! Evenif it is a few days to get it sorted. Organisation is the key and I love baskets and tubs to make sure everything has a home.