Perhaps the best habit you can get into is checking your car on a regular basis. Daily checks aren't essential but there are certain things that can be done every week to help maintain your car and boost its performance.
When filling up with fuel, check tyre pressures
at the same time. The correct pressure will help performance and
safety. Don't forget the spare tyre, either. Get into the habit
of checking the battery's water levels and engine coolant along
with the windscreen wash.