When I was a journalism major at Lehigh University in the 1960s, a "J" professor suggested that we write a daily column of about 500 words -- about anything, and not necessarily for publication. It could be a reaction to news, some advice, an essay, an interview, a sports report, history, a review, anything.
He said that if we expected to get jobs at newspapers (and that was the likely career choice) we had to be able to write on command -- quickly, professionally and about anything.
While most of my journalism has been practiced at magazines, not newspapers, that experience and discipline has been valuable while writing for a wide range of media plus advertising, PR and books.
Today I seldom write for publication on paper, but I publish multiple blogs, and post a lot on Facebook. Some of the blogs and FB posts later evolve into books.
I recently started to collect some of my daily posts on my personal website, http://www.MichaelMarc.us. It's a convenient place for me to view my own words, and for others to see what I'm all about. Every author should have at least one website, but it can do more than try to sell books.