Here are a few things that I find helpful.
I work three days a week, so I plan in advance what I'm going to wear on those three days and make sure it is clean and ready to go, that I've got enough clean tights etc. Then I leave the outfit out the night before, including underwear and shoes, so into not scrabbling round in the morning looking for the right bra/top/trousers.
Meal plan and buy the right groceries for the meals I plan to cook. Use leftovers for lunch the next day instead, kills two birds with one stone.
Have a planner in the kitchen and everything goes on it as soon as it is arranged. School trips, dinner with friends, payments needing made, everything.
Set reminders on my phone for all sorts of things - car MOT, cancel a subscription, meet a friend for coffee
Declutter the house - it's far easier to be organised when you know where everything is and you're not overwhelmed by 'stuff'.