I write books that feature characters with disabilities and I give talks about disability/diversity.
It depends on the day - most days, I'll get up, have breakfast, and start writing. I always work standing up, using my ironing board as a desk. When I'm writing, I like to work in quiet places, and I try to work at home, where I can drink as much tea as I want. Other days, when I'm on the road for speaking engagements, a "perfect day" means that everything goes over smoothly...no flies in the ointment.
Take however long you need to learn how to communicate in a way that captivates readers. To do this, you'll need patience and passion, so you keep at it even when the going gets rough. You'll also need to read other writers who've excelled at the kind of writing that interests you. Get rid of your ego too; writing is never about the author, but the quality of the work. Finally, learn to say no to distractions that keep you from your desk. You will disappoint friends, but it'll be worth it.
Here's the first step for college students
Think about getting a degree in something other than writing or English. I think my degree in anthropology was more valuable than my MFA for a number of reasons. Anthropology educated me on different ways of thinking, encouraged me to value openmindedness, and taught me how to see the world through the eyes of people unlike myself. In addition, choose your friends carefully. Popular friends aren't as important as interesting ones. Be willing to be a weirdo, and to hang out with other weirdos.
"You need to edit this. This story could probably be better."