Regardless of Railroading or Sandboxing, do you run your games so that things NPCs are doing happen in the background, independently of PC action or non-action?
Major NPC Activity-
12 - Events Greatly Favour NPC (New ally proves most helpful, etc.)
11-09 - Events Somewhat Favour NPC (NPC receives aid/funding, etc.)
08-06 - Events Favour No One
05-03 - Events Somewhat Disfavour NPC (Rival (re-)enters the scene, etc.)
02 - Events Greatly Disfavour NPC (Rival gains the upper hand, etc.)
Weather Events-
12 - Extremely Favourable Weather Conditions (prevailing winds, bumper crop, etc.)
11-09 - Slight Edge Provided (weather worsens after the NPC's forces pass through, etc.)
08-06 - Events Favour No One
05-03 - Weather Somewhat Disfavours NPC (weather worsens as the NPC's forces enter region, etc.)
02 - Extremely Unfavourable Weather Conditions (Avalanche, Blizzard, Drought, Forest Fire, etc.)
Support-
12 - Groundswell support for NPC's platform premise
11-09 - Increasing support for NPC's basic premise
08-06 - Much discussion, consideration, counter-proposals, etc.
05-03 - Increasing opposition to NPC's basic premise
02 - Massive backlash against NPC's platform premise
Acts of G-d-
12 - Forces opposed to the NPC meet with disaster
11 - New route or mode of travel emerges
10 - Opposition leadership is fragmented
09 - New commodity enters marketplace
08 - Opposition faces in-fighting
07 - A period of peace prevails
06 - Opposition unites to oppose NPC faction/ideology
05 - Market scarcity for important commodity
04 - Opposition gain powerful leadership
03 - Trade route or relations collapse
02 - Forces opposed to the NPC met with great boon
je ne sais quoi-
12 - Fashion changes required to maintain/gain social position
11 - Cultural transformation due to technological innovation
10 - Famine-stricken area receives relief
09 - Previously disfavoured idea/ideal gains popularity
08 - Extant illness fades
07 - Romanticism flourishes
06 - Extant illness spreads
05 - Extant food/spice becomes all the rage
04 - Blight/Rust spreads throughout region
03 - Rare flower gains enormous social significance/symbolism (red poppies on lapel, etc.)
02 - Game-animal disease begins to cross borders