Number two is my favorite piece of advice. Writing is like a muscle that needs to be worked out again and again, kind of like brushing your teeth. After you establish the habit, you should feel a bit empty when you don't do it. Make a schedule and stick to it.
1. Read at the level at which you want to write. Reading is the nourishment that feeds the kind of writing you want to do. If what you really love to read is y, it might be hard for you to write x.
2. Exercising is a good analogy for writing. If you’re not used to exercising you want to avoid it forever. If you’re used to it, it feels uncomfortable and strange not to. No matter where you are in your writing career, the same is true for writing. Even fifteen minutes a day will keep you in the habit.
3. You can only write regularly if you’re willing to write badly. You can’t write regularly and well. One should accept bad writing as a way of priming the pump, a warm-up exercise that allows you to write well.Jennifer Egan, Why We Write