My tips,
Get a set of 5 drawers for each child, labelled monday to Friday. On a sunday night put in everything they will need for the week, clothes, pe kit, fancy dress for thursday etc. I set up my work outfits for the week including underwear too, and hang them up in the bathroom ready to go. I also pack ds a nursery bag for the week, with multiple changes of clothes in, rather than having to do it every day.
Keep a calendar on the fridge/set up a shared calendar app with your dh. Put every single thing on it. If it's not on the calendar, it doesn't exist. Make sure everyone in the house understands this, and if they are old enough, make them responsible for adding their own things.
Batch cook, if you're making spag bol for example, do double or triple the amount. Freeze leftovers.
Meal plan and online shop accordingly. If you're doing packed lunches for the kids, include those in your meal planning. We use amazon subscriptions for a lot of stuff, particularly bulky things like toilet paper, it comes every month, or however often you set the order for. One less thing to think about. If you're planning to do online shopping frequently, consider a delivery pass to save money, or see whether a click and collect for one of you to pick up on the way home from work would help.
When meal planning, we try and do a mix of freezer meals and batch cooks, so we're not having to cook from scratch every night, and we're continually replenishing the freezer.
Invest in a large capacity washing machine and tumble dryer. Larger the capacity, fewer loads to do. Also if it has a delay function you can set it to come on at for example, 5am, so clothes are washed/ dry just as you get up. Fold clothes straight out of the dryer. The vast majority will not need ironing. I also have a hand held clothes steamer which is quicker and easier than ironing when I do need to get creases out. I try and do a big wash friday evening, shove it in the dryer overnight and fold saturday morning.
Get kids to help as much as possible, and create routines with them, for example putting clothes away ready for the coming week, clearing out school bags on friday, repacking on sunday ready for the week. Help them to take some responsibility, for example one empties the dishwasher after school, the other feeds the dog (age appropriate of course).
Your partner needs to step up too, a lot of this is mental load stuff, and theres no reason it has to be you who does it all. Be careful to make some time for you, otherwise it can be exhausting. If you can afford a cleaner, definitely get one.
Finally, routines dont have to be set in stone, and the first couple of weeks full time will be challenging. Make time to sit down with your partner, after a couple of weeks and work through what is going well and what needs changing. Share the load as much as possible.