I’ll list a few of mine:

• I keep an organized bag of chargers and power banks in my work book-bag. Super helpful whenever I run low or need a specific charger, especially when traveling.
• at least one diaper and pad in my bag and car for family members.
• two screwdriver’s in my bag. One for my eyeglasses and one for normal use. The eyeglass one is rarely used but when it’s needed it’s essentially and a pain if I can’t find one.