Check the recommended tire pressure in the door panel of you Tesla vehicle and optimize regularly.
Hypermiling
Quickly turn off the fan
While using the window defroster, use a long press on the fan button to turn HVAC off completely.
Feeling economical?
Get a great deal more milage by turning off the fan and heater when its above 45° F/7° C.
Cold battery, limited regen
If the battery is cold regen braking is limited. The line underneath your speedometer has a dot at the left side.