1. Get up every day like you would for any other job. Get dressed, brush your teeth, put shoes on, and mentally prepare to go somewhere. Treat it like a job, because it is.
2. Take your union approved breaks and make enough text during the day that you sweat through your shirt.
3. Write during the day like you have no where else to go.
If you have a good job, you'll have flexibility, but your employer will still want you to put in your forty and then some. Make sure you are that employer and the employee that works hard to keep their job and the flexibility they've earned.