@NoGamesTolerated food (priority) water and water sources (bigger priority) seasonal clothes, blankets, tarps, boots, rain gear). Tools (mechanical, gardening, construction). Building materials. Fuel sources. Bullets (because, you never know). Information (books on gardening, medical, wild edibles... anything.) Medical supplies. Various ins and outs.
@Notanymore Many people think they're immune to bad events but things can change fast! You'd be a good person to know in an emergency (one without bouncy castles).