Back when I was studying my group had a small project that was about sunstainable farming on Mars and one of the biggest challenge was the cold nights on Mars. We determined that heating up sand just right and surrounding growing-pods with said sand might work as a low energy cost solution to keep plants at a good temperature outside of living areas.
This didn't lead to much but was a great learning experience.
For people who don't know: Pepper & Carrot is a free and open source webcomic series by French artist David Revoy. You can find the comic in as many languages as people are willing to contribute to.
You should read about it on the website of your local donation center/organisation. They probably have the best info.
Where I'm from you get a cookie!