These are the notes I have made based on best practices I have read on the forum.
Day of Plaster
Clean up around the pool area the day before - brush any dirt/mud or debris that could be tracked into the pool during or after plaster
Verify that the bags of plaster are the proper type and color you selected on morning of plaster.
Take a sample of the mixture when they are applying it to the pool by pouring some in a small clear plastic cup (good for reference later)
Do they have all the proper return nozzles and drain covers (type and color) to place after plaster installed
Have you tested your fill water? Are you filling with softened water or regular tap water?
Have your hose ready (and clean) as it will be laying in the pool.
Tie a sock or cloth around the nozzle so it does not sit on the plaster
Ensure you take note (or a picture) of your water meter reading before you start to fill
Be prepared to take note of your water meter as the pool reaches certain levels, i.e bottom of bottom step, top of bottom step, etc. (it helps in the future to know volume of your pool at certain levels - should you ever have to drain portion of it)
Plan to set an alarm every 4 hours (or so) to ensure hose is still in pool, no debris blew into pool, etc.
Take a picture of any chemicals they bring on site that they plan to dump in when they start to add water to pool
Continue to fill pool to center of water tile or center of skimmer. Take picture of water meter at end of fill
Get clear instructions from PB as what to do the day the pool is full - how often to brush, will the pump be turned on, etc.
Define with PB when he will be back out to set up water chemistry.
Hope this helps.