Paul Jun for 99u, introduces the idea of mastering skills for working alone:

Working alone is about creating the space where intense concentration becomes easily accessible. When finally alone, it’s easy to allow a wave of self-doubt and insecurities to begin to flood your mind. Sitting in solitude for even five minutes makes you get up to grab a snack. Or to check Twitter. And perhaps the most challenging of all, you don’t know when to call it a day; the constant polish and re-polishing when your energy is low masquerades as productivity — or so it goes if you’re not prepared.

If you begin to work alone with only the toolset you have from working in an office, you may run into some trouble. Thus, working alone requires mastering a few key skills...