Write more and you will become a better writer, more proficient and more productive. But the benefits of writing every day go beyond honing your writing skills.
I know that I think better, and I function better, when I write regularly.
Writing clarifies my thinking. Taking the random bits that are floating around my head and putting them on the page is incredibly helpful.
When you write a lot, you have to come up with ideas to write about. That causes you to pay more attention to what is happening around you. Suddenly, everything you see, hear and experience becomes something you can write about.
Writing every day creates discipline. Doing anything every day will cause you to become more disciplined, but writing is especially powerful.
There are lots of ways to get in the writing habit. Here are some things that work for me, and that might work for you, too.