I was listening to one of my favorite writers and speakers, Carolyn Myss. She offered the following insights: (paraphrased from memory)
Writing is a job.
You must treat your writing like a full time job. (Even if it isn't.)
Every day, you must sit down at your space and write.
If you cannot commit to writing your novel because you lack the focus, then step away from your novel. Try something smaller, like journaling every day. Practice, talking about your day in metaphors, symbols etc. Also, work on expanding your vocabulary, and develop your voice.