The key to being good at anything in life is to do it every day. No matter how talented an athlete or artist or writer may be, they have to work at it daily to perfect their skills.
Sounds simple, but its not. Most of us spend a majority of our time fulfilling the obligations of a full time job, school, family and social life. Then come distractions, including the myriad of addictive forms of entertainment like computers, the internet, and television that we all have such convenient access to these days.
The biggest hurdle to daily writing or drawing is getting started and making it a habit. Here are some methods I am finding helpful in attaining that goal:
1. Combine writing with another activity you already do every day. I draw daily and so have begun combining art and writing into an art journal. I also use email every day, and so have begun emailing myself snippets of writing whenever I have the time, such as break or lunch at work.
2. Join a group or class that has expectations of its members. Some people benefit from that extra push to get ourselves moving.
3. Start a blog on a subject which you are passionate about and post a quick entry every day. Not the same as working on your novel, but at least it will get you writing. It may also help to know that you are producing something.

Today's daily sketch drawn directly in pen, of course, and this article is my daily writing!
4.
Keep a log of your daily writing word count and give yourself permission for a small reward any day the word count is above fifty. That’s just a few sentences, so you know you can do that! Sometimes once you get started, you just keep going, right?!
5. Write in pen (or when using a computer, pretend the delete key does not exist). When I began drawing with pen rather than pencil, it was hugely liberating. No more reliance on the eraser, no more feeling that every line had to be just right! My productivity went up tremendously. I rarely draw in pencil now. Likewise, if I allow myself to use that delete/backspace key when writing, it’s so easy to get stuck on rewriting the same sentence or paragraph rather than just getting the story down.