One of my missions is to write 1,000 words per day. Once I start writing, the clock ticks. It's attainable only because I set it high on my list of priorities. You might be surprised at how many tasks in your life are not as necessary as you might think.
You won’t catch every error in your manuscript. Only one kind of magical spirit can pull off such wizardry — professional editors. You should hire one if you’re serious about this whole publishing thing.