Not a full bugout bag but a 'get home bag'. As in, say, you're up to ten miles from home and something happens; terrorist attack, weather disaster, quake, whatever. And you have to walk home.
For the moment let's say this time of year: cool to warm weather, chance of rain.
Aside from your sidearm(if you're in a place that remembers this is America) that should always be with you, what would you want to have in a bag to help you get home?