Survival stats are a background task. Handle them in bulk and they stop eating into the hours you need for crafting and building.
Water first
Water drains fastest and causes the worst penalties. Boil in bulk and keep a stack in storage rather than drinking as you go.
Food and cooking
Cook at a campfire in batches. Raw food is a last resort, and cooked meals give better stats for the same ingredient.
Injuries
Treat bleeding, infection and broken limbs immediately. Each one quietly removes capacity you cannot spare during a horde.