Regarding keeping the house tidy, I would take one room, each week and make it your PROJECT to declutter it.
I did this - gave me something to work towards, and the kids 'helped' - pottered around me, hid in boxes etc etc. I 'ignored' them, chatting away but focused on my project to declutter
Do it room by room, as much as you can, with regular breaks - trust me, once the clutter is gone, your head clears and there is less to tidy each day!
Kitchen: Do you have lots of stuff on your work surfaces in the kitchen? Put small appliances in cupboards, clear away paperwork into boxes/drawers/organised spaces - check Pinterest for ideas it's fab
Bedroom: Sort your underwear drawer so everything is easy to access in a morning, sort your clothes, EBay sell them, etc etc
Kids room: Either keep their toys in their rooms, and have just ONE box of toys in the living areas. Then ROTATE these boxes weekly so you don't have to keep buying them new toys
Bathroom: Regular harpic down the loo and a brush around then a quick Jif around the sinks - I keep a sponge and wipes in the bathroom and if it's looking iffy, I do a quick clean - Flash wipes are brilliant
Living room: WHat is the basic need in your room - don't have mountains of toys in there, just ONE box of toys as above. Cushions and snuggle blankets for you when you're feeling like you need a hug! Wrap yourself up and it will calm you down. Worked for me.
Hoover or brush floors each day, or every other day - I used to dress up kids into buggies before our morning walk or the 2nd afternoon walk, then while they're in the buggies, I'd do a quick floor sweep. REALLY helped my mood to have clean floors to come back to
I don't know what else to suggest - oh yes, clean the shower while you're in it, clean max 30 mins each day - it doesnt have to be a massive operation, just spray and wipe and you'll get there
But DECLUTTER first - you must - then there will be less STUFF coming in on top of you so to speak
Sorry lonnnnnnng post again!