I have 2 under 2, we both work full time (compressed days as childcare is so expensive where we live 🙄) and lm doing a professional qualification work are paying me for
My thoughts are;
Cleaner (even if it's it's fortnightly then it keeps things a bit more sanitary)
Strict naps and bedtimes. So you actually have windows of being able to do tasks or actually relax
Batch cook so there's something in the freezer to fall back on
Plan ahead for Christmas, birthdays, Easter etc
Regular clear outs of our stuff and kids stuff. Our local area has a children's clothes and accessories swap. Decent stuff l flog on Vinted. Other stuff gets charity shopped
Lower standards and sweat small stuff less. This also includes not getting sucked into "shoulds", if you want to do it then do it. If you are half hearted and it's not essential then give it no headspace. Whether that's a night out or teaching your 4 year old French! Pick your battles
Both of us have clearly defined tasks -l couldn't bear husband flapping round and expecting me to remind / instruct him. Like l said it's part of the job! So he knows each week he has to do a certain number of meals, clean x and y. Mess the kids make on his watch he clears up and vice versa e.g. the mini milk incident on a hot day yesterday that he regrets now. Let's put it this way, the children can't eat them in the pushchair anymore!
Inlaws help out where they can which is appreciated but infrequent. As they both have their own long term commitments and there is a very elderly grandparent in the mix who needs are currently increasing somewhat.
My mother is utterly useless. Never changed either child's nappy or ever cared for them. But ironically gives us "tips" and "suggestions" about our parenting. Appears confused my garden isn't like something out of Chelsea Flower Show. Probably because some days l only get 30-60 minutes to myself and l can't be arsed!!! She's more a hindrance as she won't plan and won't accept we are limited by work / childcare / annual leave. We are now LC funnily enough...
Lastly have an online rolling shopping list so whoever goes to the shop knows what is actually needed. Also a shared electronic family calendar so avoid conflicts and help planning