I think what you are thinking of is what I call my on-body kit. Stuff that is easy to get to daily, used frequently etc. I have made a couple of the traditional sealed PSK's but my vest, pockets, coat, and shoulder bag comprise my easy to get to and use kits.

Many of these sort of kits have been discussed in Urban preparedness threads. Searching for "Urban kit" will most likely bring up a ton of stuff.

Each of us has a slightly different approach based on our own expected scenarios. My daily use kits (Urban kits) are based primarily on natural disaster prep and are heavy into shelter and communication. I just posted my shoulder bag kit in this thread.

Shoulder Bag-Comm kit

My on-body kit blatherings were done long ago but are still about what I do.

Commuter preparedness kit

My on-body and carry kits

Loads of others have posted similar threads. I do not necessarily consider my approach a survival approach as much as a prepared approach. Much of the junk I have around me in kits is as much for everyday enjoyment as it is for survival. Dual use stuff sort of.

What I end up using most often is my Sebenza, HAM radio, flashlite, and money. Since I wear my wool vest everyday I guess it could be included as my most used wearable shelter and kit container.