For one thing, it's definitely saving the planet. As much as I love reading a paperback, the truth is that it's important to be mindful of the environmental costs. All of my paperbacks are made from 30% recycled materials.
It's such a crummy answer and it's not really what people want to hear, but it's all about routine. Making time to write. Making time to self-edit. Making time to promote. It's about prioritising your writing and keeping to a schedule. The more you keep to a routine the easier it becomes.