Start on the smallest space - hallway, under stairs cupboards, bathroom, bedroom, living room then kitchen
Before and after pics are good as they can be used for motivation
Be ruthless, which is easier said than done I know. So try to allocate a spot in the house for things - a spares drawer for batteries and light bulbs, only clothes in the wardrobes, toys must be kept in a certain box ect. if you know how you want the house it will be a lot easier to clean up as you know where to put everything and you know what you need.
Also this is the method I used when I worked in cleaning. I did a lot of houses which were lived in by hoarders or people with mental/physical illness which stopped them cleaning their houses, I promise you it's the easiest and quickest way to get results.
Rubbish - anything that obviously needs to be binned, throw it out immediately. It's amazing how much space this clears up.
Recycling - again anything that is noticeably recyclable goes in the recycle bins.
Empty - take out everything from the cupboards/drawrers, dressers ect (I'd advise to do one at a time or else you will end up with all the contents from one room on the floor and it will make you feel overwhelmed and want to stop - also it's your home so you need to have access to everything obviously)
Clean - whatever cupboard or drawer you have just emptied, clean it
Sort - anything you've taken out, sort into piles (keep, throw, charity, belongs in another room)
Throw - pretty self explanatory - chuck the junk out
Put away - put all the things you need where you want them to go. (If you have something which belongs in a drawer or cupboard you haven't cleaned out yet, place it in a box near the cupboard - it has to go there you're not allowed to chuck it in a 'I'll do it later' drawer - I personally found that when I saw a box of things that needed to be put away it motivated me to clean out the place they needed to go into)
At some points you will just have boxes or bags of things waiting outside allocated rooms and cupboards but it is really good motivation to work through the house so everything can go into its place.