I spent about 30-40 minutes tidying/cleaning the house on Boxing Day. It's all back to normal, completely uncluttered, hoovered, etc. NOT a boast - I used to be super messy and couldn't really see what needed cleaning. But I have learned over the years that I feel better when things are in order.
Take the basis of your living room (for example). Sofa, TV, armchairs, floor, coffee table. Find a home for ALL the crap and stuff that has accumulated on top of these items. Strip it back to those mentally and don't stop going until you get there. Leaving only stuff that should be out i.e. lamps, fruit bowls, picture frames.
Same for kitchen. Picture your kitchen with completely clear sides and table except for kettle, toaster, microwave or whatever. Then get rid of anything and everything that shouldn't be there.
It's easier than you think to get there, it does require elbow grease, determination and getting off the sofa for an hour or two
But this clutter is not bolted down, it's not permanent, you can move it with your own two hands. You don't have to sit there looking at it and bemoaning it, as such.