Ten minutes at a time - just chuck crap into a bin bag, fill it without engaging your brain much - if you wouldn't take it with you if the house was on fire, you don't need it. Tie up the bag, put it outside, sit down with a cuppa. Odds are that you can do several of them without even moving that far from a chair.
You need to be able to see your sink. Take the time to stack pans, plates, bowls and gather all the cutlery in a baking dish - on the hob is a great place, as you aren't cooking right now. Knock any lumps of food out/off them into a binbag.
Clean the sink and drainer. And the bowl if you have one. You have somewhere clean to clean your stuff now.
Do one load - plates or bowls. Don't leave anything in 'to soak' as that really means 'to forget about it whilst it festers away, slowly gaining sentience in a grim smelling soup'.
Have more tea.
Put those plates/bowls away. Do the next load - cups and mugs?
Walk away from the washing up. And sit down again. Use the time sitting to chuck whatever rubbish is nearest you into a carrier bag or bin bag. Knot it and put it into the wheelie bin.
You'll most likely find some random plates or crockery around the settee. Take them out, wash them up - lots of fresh bowls of hot, soapy water here. Leave them on the drainer, empty the bowl, wipe the sink and go and do something else.
How about cleaning the bathroom sink? Have a carrier bag with you and chuck anything that is used up, looks manky or you just don't really like, into it. Shove any loo roll inners, contact lens packets, random bottle caps, etc, in the bag. Tie it up, get it out.
Squirt the sink with cleaning stuff. Clean with something scrubby, do the inside, the top, the taps and wipe over the outside of the bowl. Job done. Squirt the cistern and the outside of the toilet, wipe over with bog roll, chuck in bog, flush. Shove some bog cleaner in the bowl, shut the lid and walk away.
Go and lie down. You've done a hell of a lot already.
Day two. What else is annoying you particularly? Are the still dirty pots bothering you placed neatly on the hob? Could you get a takeaway tonight? Anyhow, maybe it's a messy bedroom that's bothering you. Open the windows, dark or light, a bit of air will help. Strip the bed off, chuck the linen into the washing machine on the hottest wash it can take and make the bed properly with clean sheets/cover/pillowcases. It'll feel amazing tonight. Maybe once you've loaded the machine, you could wipe over the thing with a damp cloth with some spray cleaner. Just the bits you see, the door, front and top. Before you go to your awesome bed, take the washing out, hang/dry it and wipe over the inside of the door and the seal. Partners quite like helping with folding sheets. I think it's a childhood thing to help or do it at camp, and it's not drudgery. You can ask him to take it upstairs or do it yourself (and not come back down again because you have the clean bed to yourself).
Day three. OK, you're going to have to deal with those pans. There's no law that says you have to keep the one that always sticks. Wash them up and whilst they're on the drainer, lift the supports up and clean the hob. Put the supports back and put the clean pans back on it. Deal with anything in terms of plates from the last two days, make sure the sink is clean and you're done there.
Make a cuppa. Could you wipe over the fridge, freezer or table whilst you're waiting for the kettle to boil? As you sit down, is there something like the Christmas paper visible from your seat? Plan, pick what pisses you off the most. Once you've had your tea, get up and get that annoying bastard into a bin bag and tie a knot in the top. Shove it in the wheelie bin and take your mug back to the kitchen for a quick clean.
Day four. Now what's annoying you? If you aren't sure, just do a bin bag banishment. Make sure your bed is straightened, as it's going to be great coming back to it.
Could the shower/bath plughole need dehairing? Yes, it's gross. Pull the hair spiders out and shove them in the loo. Flush them away. If getting rid of that pleases you, how about clearing the end of the bath of the half bottles that you don't use? Any chance of squirting the end, taps and sides and then rinsing with the showerhead? Stick some fresh towels in and take the existing ones down to the washing machine. Bung them in on a hot wash (chuck any that look manky into a binbag).
Do a couple of ten minute bin bag banishments and get some sleep.
Day Five. Floor. Scoop up anything not nailed down or frightfully expensive and banish it. Get vacuum cleaner and do the 'open' bits, empty vacuum cleaner. Could you go from the living room to the hall? Feeling brave enough to do the open bits of the dining room? Good. Time for a cuppa. Try cleaning a countertop whilst waiting for the kettle. The one where you chop up food would be best.
You've then got time to consider what is most important to you to get clean next.
Limescale marks are nothing compared to dirt where you prepare food, but wiping over everything makes it look clean with limescale marks, compared to filthy. Having a clean sink helps. Stacking things helps. Doing short bursts of activity in between cuppas really helps.
Being brutal, as in 'I don't want to look at that shit anymore, much less deal with it' really, really, really helps. Gradually, the amount you do increases and the amount you have achieved builds up so that the 3 hours of washing up becomes five minutes of two plates, done as you take them out in the first place. The floorspace increases and gets cleaner. You don't have a billion bits of crap yelling at you for attention, as the moment something catches your eye, it vexes you and you banish it.
It didn't get like that in a day, nor will it be perfect in one. But you can make far more progress by doing short bursts of activity than looking at the overall picture and giving up in despair.