If nothing else this book will get my house cleaner than it's ever been. "I'll write after I clean out the pantry." "I'll write after I sort the linen closet." "I'll write after I wash all the dog's bedding." "I'll write after I wash all the baseboards with ammonia." You get the idea.
I think that's true for all writers. Everything else seems so interesting and so important when you know it's time to write.
The discipline does get easier. But, even then, it can be a challange.
Just keep writing.