Once I close my pool the only thing I check is the water level.

Like Al, I like pH to be a bit higher for the winter.

Generally, I first get all the tests where I want them and raise pH to 7.6-7.8.

Then I shock the pool to the shock level appropriate for my CYA (whereever I have it that season).

I then add 1 quart of Polyquat 60% and wait 48 hours. I test FC again (it usually drops to single digits or even to 0), then I shock it up to the shock level again, then close it.

I first lower the water level by backwashing the filter (to clean it too) until it's below the skimmer. I turn off the skimmer (I have a ball valve for that) and lower the water well below the returns using my low drain.

I plug the openings (returns and low drain), cover the skimmer, put in a Gizmo, disconnect and drain all the plumbing, put on the safety cover (mesh) and put everything away.

About once a month I check the water level and syphon off some if it's getting too high. Otherwise, I leave it alone until mid-April when the worst cold is over and begin the opening process.