Great purchase buying the 2014 FFE. It is a fantastic car for exactly your use - around a 20 mile each way commute. You'll get used to driving it, the car does take a little time to get the most range out of it.
Somebody with a lot more experience with the budget display you're asking about will probably chime in. It is highly affected by recent driving habits and isn't necessarily super accurate.
I interpret your question as, how do I maximize range? How do I minimize energy losses?
First and most important - use the brake coach. You're looking for 100% every single time (or 98% at the worst). That will change the way you drive more than anything.
Smooth is better - constant speed. Don't jab the accelerator off and on, use it smoothly. You're probably not going to see a lot of difference between 40 or 50 MPH. Things get bigger at 60 and certainly a lot bigger at 70.
Look at the MyFord Mobile website to see how many wH you are using for each leg of your trip. Sometimes the website will calculate a wH/mile, but not always. Think about how you drove both directions. I'll bet you a lot of money you drive much more zen like on the way to work, and are a lot more aggressive on the way home. The phone app rarely reports the correct numbers.
Climate control has a ton to do with energy use. After driving, that is the big killer of range. In a very strange twist, even when the air conditioning is running and it is warm outside, sometimes the car turns on the heater. That increases energy use a ton.
Outside temperature - Sacramento - you might see some cooler temps in the morning. 45 degrees is cool. Anything above that is warm. Below 45, the car starts to heat the battery - nothing you can do about that, just be aware that range will drop.
JMueller has one of the best websites around with hints on how to get the maximum range out of the car. And the best tips ever for COLD weather (that's well below 45 degrees).
Oh - tire pressure. Absolutely critical. Check it often especially on a new used car you just got. Follow the pressure on the door sill - don't add extra, don't go lower. Get that pressure to within 1 PSI of the door sill.
And I guess, I was surprised by mutt tires on the used car I purchased. Make sure you have low rolling resistance tires on all four corners. The original Michelins are excellent tires for range.
2014 Platinum White FFE (Turning in mid Dec. 2016 25,000 miles)
2013 Ingot Silver FFE
2012 Titanium ICE Focus
2014 Tesla Model S 85