I will tell you how I am, some of it might work for you, or it might not.
I very highly recommend putting your own kit together.
Even really well thought out kits might not match your needs or they might duplicate what you already have anyhow.

First, I think skills are a much bigger item than the stuff is.
A lot easier to carry too.

So first aid training before worrying about having a first aid kit.
(A well trained first aider can use almost anything around them if they don't have a kit, but an untrained first aider is still lost even if they have a full operating theater available.)

When I assemble kit I try to make as much of it stuff I regularly use as possible. Some spare blankets instead of a specialist sleeping bag for example.

I also try to make a lot of it into stuff worn regularly instead of carried, or is with stuff I don't leave the house without.
Key-ring junk is one thing, useful key-ring junk is better.

For example having whistles on the key-rings, and on the 5 year old's jacket as a zipper pull instead of in a forgettable package.
(A whistle is a great "Come here now!" signal and the new Fox whistles are both small and loud, it sure makes heads turn when you give a quick toot on one in a store, and have 7 nephews and nieces appear from between the aisles and muster up in front of you. )

I am a big fan of candle stubs, plastic pop bottles and stuff like that.
Yes a flash light is good and nice to have, but a candle stub can sit in a kitchen drawer for years and still light when you need it.
Pop bottles full of water are just as good as nalgene bottles full of water. (throw a few in the freezer and you have emergency ice packs for injuries or cooling a camping cooler too.)

I also tend to buy high quality when I do buy dedicated stuff, but I manage to stay away from the really pricey specialist or fashion stuff.
(I don't need a Titanium cooking pot to burn macaroni over a camp stove when a cheap thin aluminum one burns it just as well.)

Most of my techie survival stuff is well over ten years old. Most of it has been used regularly. Some for camping, some for doing repairs around the house and everything at least once by everybody to make sure we all know how to use it.

I could go on in detail about what and how. I actually started that way.
I won't do that.

There are enough sites dedicated to telling you what they think you should have, but a decent plan is first the emergency stuff like first aid for immediate life saving and then the stuff like a few days spare food and so on.

Just keep in mind that a lot of the kit can be stuff you would use anyhow or stuff you might be tempted to throw out.
Like an old blanket and an old winter coat can be the start of a winter emergency car kit. They might not be pretty but they might help keep a body warm if you get stuck somewhere.

There is the idea of secondary uses too.
I have one blanket on the rear seat, as well as a scratchy wool one in the trunk.
The back seat one is a "too small" fleece, and it has been a shawl, a pillow, a cover for a sleepy kid etc etc.
The one in the trunk comes in handy a lot when loading stuff we want to prevent breaking or scratching, and if needed it is still a wool blanket.

I also look at the other stuff I do buy a bit differently.
I pay a bit more attention to how it would work with no power or in another type of emergency.

I consider the antique oil lamps on the bookcase as emergency gear.
They were bought as decoration a long time ago, but they are fully functional and there are a couple of quarts of fuel for them in the garage just in case the power goes out. (they have been needed a few times)
Quite a few people admire the antiques collection without realizing they are looking at emergency gear being stored in the open and accessible.


These are just a few more random thoughts.

The basic idea for me is that being prepared isn't about hoarding large piles of gear and supplies.
Being prepared is about having the knowledge to use the supplies and gear you need to get through most emergencies.
The knowledge comes first.

Your kit has to match your expected needs. You can not plan for every possibility imaginable.
Trying to do that just drives you paranoid.

Being prepared does not need to be expensive.
My 10 dollar utility knives will cut just as much rope as 200 dollar ones will, but mine are cheap enough to have one always in the truck and one always in the car.
(The house has more than enough sharp knives in the kitchen)

My pocket knife varies a bit. I have a really small pen knife in my wallet. I also have a basic pocket knife as a constant carry.
My girl friend has a tiny Swiss Army knife with a nail file and scissors in it.
My ex wife used to carry a locking folder in her purse to slice apples for our son when he was small.
All of these are good enough steel.
They are all sharp and easy to sharpen.
None are dramatically expensive.


Make sure you have some spare fuses in the car and the wife knows what a bad fuse looks like, how they act, what doesn't work when they blow and how to change one.
(Even finding the fuse block on a lot of cars can be a pain in the butt.)
Get a fuse puller if you need it when you get the fuses too.