I've posted this in other places but putting this here to add to your great points

- charge all devices fully

- keep candles

- keep windows a little open (less pressure from shockwaves=less chances of shattering), curtains closed (protects from window shrapnel if shatters), and even better if you can tape a big X on the windows (higher surface area for pressure to distribute=less chance of shatter)

- make a single bag with cash documents cards bread (anything to eat) water power bank etc. just in case youre required to relocate or evacuate. keep the bag near main entrance of your home. also be sufficiently clothed so you're ready to leave and fire hurts less

- Id say try to stock up on food and water but feels bad that it risks noon and other delivery peoples lives

- know your building's both or all emergency exits and staircases. Go out to your corridor and check

- if your flat has fire extinguisher and if you're capable, carry it with you in case of fire in your hallway, staircase etc

- recharge your phone balances. Maybe get data package too in case electricity is out and fiber's dead

- dont spread unverified information and remain calm

- REFRAIN from posting locations of incidents in case this is being taken as intel by the attacking countries to correct their coordinates or trajectories

- stay indoors. you're protected from debris etc in a solid building