Decluttering and organisation does it for me. The old adage of "a place for everything and everything in it's place!" Took a while to "train" DH and DS, but we all got there in the end!
I have lots of storage, i.e. cupboards, drawers, etc., insisted on divan beds with drawers underneath which are a game changer for spare duvets/pillows/bedding etc that are kept under the bed they are for. Organised wardrobes with Summer/Winter sections and integral shelves/drawers. A cupboard for outdoor clothes and shoes by the front door so they don't "infiltrate" inside the house. Designated drawers for things like stationery (pens, paper, envelopes, stapler, hole punch, sellotape, stamps, etc), another drawer for minor DIY stuff like batteries, bulbs, screwdriver set, pliers, insulation tape, fuses, tape measure, etc, a drawer for "mending" containing sewing kits, ribbon, elastic, patches, etc. Kitchen organised into drawers and cupboards, i.e. a cupboard for tinned goods, a cupboard for packets, cutlery drawer, drawer for things like kebab skewers, tin opener, etc., one cupboard for glassware, another for cups, another for crockery, etc. Also drawer for electricals such as chargers/charging leads, phone battery packs, earphones, etc. I also have an upstairs and downstairs "cleaning" cupboard with duplicates of things like polish, dusters, sprays, loo cleaners, even two vacuum cleaners - one up, one down - massively reduces the time wasted going up and down stairs!!
Nothing goes in the "wrong" cupboard!
DH now has a very well organised garage where he has all kinds of tools, all in cupboards and drawers (like I said, I trained him well!), and some "professional" tool boxes on castors with drawers etc (like they have in car workshops/garages), all his power tools are on shelves, cables all neatly rolled up, packets/boxes of things like saw blades, sand paper, etc all next to the matching power tool! Same in our garden shed with the gardening tools and equipment - everything hung up on hooks or on shelves.
Along with that, I am a big de-clutterer, and at least yearly have a big clear out, by going through all the drawers, shelves, cupboards, etc and being ruthless to either sell, charity or bin things we've not used that year. In between times, I get rid of things on a day by day basis that are broken, damaged, used up, etc. - there's virtually no chance of anyone picking up a dried up pen as we're all "trained" to ditch them when they start to dry up rather than just chuck them back in the drawer!
Re household repairs, etc., again, we do things as we notice them. Whoever turns on a light and it blows is the one to change the bulb, likewise fuses on electrical items. We keep "part used" tins of paint, so if there's a scuff or scratch on woodwork or a painted wall, we'll just get a paintbrush or roller and sort it out at the first convenient opportunity after we notice it. Likewise with things like electric switches, sockets, plugs, sink taps, sink wastes etc - if it's something whoever notices it can sort out, they do it - if it's bigger/complicated, we have a conflab and make a plan, whether it's time we need to DIY after buying what's needed, or (heaven forbid) get a tradesman in to sort it. But nothing gets left for more than a few days before it's either sorted by us or we arrange for tradesmen to come and look at it.
Same with our 3 cars. All organised inside, things like wipes, cloths, cash for car parks, sunglasses, tissues, pens/pencils/paper, bottles of water, insurance certificate, and road map, inside the car either in the glove box or door pockets. De-icer, rug, umbrella, tyre inflater, etc in the boot. All 3 washed and vacuumed every month.
We also have "go-bags" which are small canvas bags containing drinks and snacks which which "pick up and go" when we go out, if we think we may end up delayed etc., even for short journeys sometimes, i.e. crisps, bottle of water, snack bar, etc., and we'll usually pop in a piece of fruit on the way out. If we don't use it, we just bring them back, pop the fruit back in the fruit bowl and hang up ready for next time!
I've never had the time nor headspace to waste time searching for things, i.e. looking in random drawers/cupboards, looking "under" things or "on top" of things. Never had, ever since childhood. I need the certainty of knowing that whatever I need WILL be where I expect it to be. It's like an investment in time - yes, it takes up front time to be organised, with is a "time cost", but in the long term, you save so much more time by not wasting it looking for things, not having to "make do and mend" because you can't find the exact thing you need, not having to waste time/money making unnecessary trips to the shop to replace things you've lost/can't find, etc.