For the first few "representative" trips I recommend resetting one of the TRIP counters and making a note of actual wH/mile, e.g. normal summer day, cold winter day, torrential rain day. Wifee hates maths, so I have a little chart of distance vs. percent SoC and also recharge times at home / supercharger to make it easy to guestimate. Suggest you try
Tesla Log and
TeslaFi which will log data about your journeys and save you having to make notes as you drive etc.
The "habits" that I have developed include:
I drive with SatNav on (even familiar journeys, I MUTE the sound) then on the Energy Graph on TRIP which shows graph of predicted energy use vs. actual. If arrival prediction falls below 10% (about 20-25 miles for my P90D) I slow down, if it goes above 10% and I am, say, less than 30 minutes from home I stop checking and speed up if I want to. If it falls very low, say 5%, I reduce speed to 50 MPH and if I had a considerable distance to go I would aim to splash-and-dash charge. Here in UK on a long journey I am almost bound to hit either road works or traffic on highway, that 15-ish minutes at 50 MPH does wonders for my estimated arrival SoC !! I have been confident enough to [driving slowly ...] arrive home with 1% and less than 5 miles range left, but I prefer not to!
When recharging at SuperCharger I leave as soon as the Trip Energy Graphs predicts arrival SoC above 10%. No need to waste time charging more (I did at every recharge when I first had the car ...
). When I SuperCharge I reset the Charge Limit to 100% in case I am delayed shopping / pee-ing etc. so the car makes use of any extra time - but I am also alert if the site is busy and their might be cars waiting (its only happened once)
I drive 15 minutes out of my way to get to a supercharger, rather than using some other charger (which will be, at best, only 50% of the speed of Supercharger).
I charge to 100% if my journey is 160 miles or more (my real-world range is 175 miles in lousy weather, lead-foot, 200 miles if careful, and say 225 miles if I drive at 50). This has meant that on a 175 mile journey I can detour, "hurry up", or encounter torrential rain / wind etc. When I first had the car I thought 90% was enough for a 175 journey - it IS but it is OFTEN tight ...). Also, I always put RANGE MODE on if my journey is more than 160 miles (this may make much more difference on a D than a RWD).
I charge from 90% to 100% just before I leave (it takes me over an hour to charge that last 10%) in order not to leave the battery sat for long at 100% ... but I've read plenty of threads here which suggest that worrying about that is nothing like as significant as I first thought, but that said: if I did charge to 100% and then my trip was cancelled I would probably drive to the shops and back
If plugged in I take the opportunity to pre-warm / pre-cool the car on Shore Power before I set off (make sure RANGE MODE is off, so that the battery is warmed too)
Full charge means no regen. For me, by the time I have driven the 10 minutes to the highway, I've used up pretty much enough to get Regen back again. Need to remember there is no regen when I get to the first bend though!
I use
EV Trip Planner to plan all longer distance, unfamiliar, trips. Although
A Better Route Planner has matured to the point where it is starting to look better.