Our school has the same amount of non uniform days each school year, has the same dress up days and has the same rota for the Christmas fair.
To make things easier, in August I put in the amount of £1 coins needed for the non uniform days, the £2.50 needed for the 3 discos and get the Chocolate, the pocket money toy and the bottle for the Christmas fair so it's all there ready and no scrabbling about for a £1 for non uniform.
Bedding sets kept inside the pillowcase
Every time someone goes up and down the stairs, they have to take something to put away.
If I'm boiling the kettle, I can get the kitchen work surfaces and cupboard fronts cleaned.
Clean the bathroom while the bath is running
Wear tshirts under jumpers in the colder months so that the jumper can be worn again and only the t-shirt needs washing (easier to dry than a jumper)
We've recently got an outside storage shed and started bulk buying and store it there. Things like cleaning products, tinned food etc.
In January I buy a year's worth of birthday cards for the family and friends and then write them. Their birthdays are marked on the calender and they get posted a week before.
I also buy the family Christmas cards for the following year. This year's family Christmas cards have a sticker total of £30 odd pound but I got them all for a tenner in the sales.
Any important dates go straight onto the calender and in my phone and the letter binned.
File away paperwork when dealt with. I keep a concertina file which is relevant for the year. E.g. a section is DH pension stuff. When the stuff for 2018 comes in, 2017 gets taken out of the file, put in an envelope and marked up and put in a storage box.
Paintings and pictures and models etc made by DS get photographed and stored on our portable hard drive and the originals binned. Last Christmas one of my presents of DH and DS was a photo book of all the cards DS has made me (front of and writing inside) all in one book. This sits on my bookshelf and takes up less space than keeping all the cards and drawings etc.
Keep a list of previous presents etc you've given to people so you can refer back and not buy again. I buy Christmas presents starting January and through the year of things that I know are always needed. DS always has new PJ's at Christmas so things like that, to spread the cost. I also save £25/30 a month into an envelope to buy family presents with so it's not a huge shock, the money is there.