Although Zen and the Art of Motorcycle Maintenance is a worthy read, the two best books I've read on producing great work and learning to master anything are.... The War of Art by Steven Pressfield (This is a must read) as well as Ignore Everybody by Hugh Macleod (also a must read). Those two books might be more useful to your art/relationship and steady work than getting up at 4am. Of course after reading them, you might decide you have to get up at 3am. LOL.
I've given a number of college lectures to Photo students over the years and always suggest they read these two books before they head out into the jungle.
Also remember, no one said it was going to be easy.