If you are a two story house, plan on a wiring space in the basement to run everything too.

Near there have a few conduits run to the attic from the basement. You will need to plug them with firestop but it makes it so easy to add wires to the attic or upstairs.

Typically near the air return is a decent downstairs to upstairs path

If you are not a fan of wireless, two drops to each spot you think you will need it, and then two to the opposite side of the room

Two:

1. I have tilt sensors on my garage door openers. if the doors are open for more than 5 minutes a hallway light begins to pulse in an angry red.

2. I have a motion sensor in the upstairs hallway that lights up one bulb in the stairway very dim. I get up at night a lot, and we have 4 cats that just keep trying to murder me on the stairs.