I just got a new battery pack. After Tesla agreed I was using way too many miles per trip. They found bad module in the pack.
BUT, usage and range are an illusion unless u keep very good notes. I have 175k miles, been in over 25 states. Super charged a few thousand times. Run out of juice twice.
First, Tesla told me the pack must be maintained at about 70 degrees for best performance. So either way the cooler/warmer system is running. Second, it also depends upon how much u have turned on? Even the mileage tripper uses juice. Third, as you said, driving habits might kill it. Short trips I break 100 easy on I95. Long trips I never exceed 73. Fourth, the 12v battery is kept at 14v by the regulator using pack juice. I got this lecture when my car died on 95 one day, they never figured out why? But it was down to 12.5v and shut car off. I just changed out the original 2012 12v battery, because I got the message it was bad.
Bottom line, keep reallly good notes in a log book. That way u have a reference point. Good luck.