The 2 keys for my house are essential. I have the keys to my car and scooter on a separate ring. The other items are: A Pico-C 16 GB USB Flash Drive, a water proof container with matches, a loud whistle for emergencies, a starbucks gold card, a Nite Ize C9S-02-01 Small Figure 9 Carabiner (to quickly add and remove items and to tighten a rope without a knot) and a lanyard that can be unraveld into a few feet of paracord (like the survival bracelet). This key chain goes a long way and is still fairly small.