My main emergency kit lives in my car:

• Technology / lighting / battery module
• Knife / saw / tools module
• Warmth / shelter module
• Medical module
• Admin / reference module
• Navigation module
• Comms module
• Water / Food module
• Hygiene module
• Defense module

This is in one (fairly heavy) bag that's "wife-portable" for shorter distances. In the unlikely event that a longer walk is called for, we'd need to divide the load or dump some of it.

The winter module is added on to that:

• Snow brush / ice scraper (heavy-duty, extendable model made of stainless steel
• Voile Telepro avalanche shovel
• entrenching tool
• extreme cold weather sleep system
• Work gloves
• Extra cold weather gloves
• Extra parka
• Dry clothes

There's a car-specific kit that has some relevant components:

• Good spare tire
• Working jack and lug wrench
• Two feet of steel pipe to use as a cheater bar for lug wrench
• Tow strap
• Thick jumper cables
• Costco "jump pack" jumpstarter/compressor/area light, charged monthly
• Galvanized wire
• tire plug kit
• Alumaseal
• self-fusing silicone tape
• Assortment of auto fuses
• four hose clamps