Your success depends on your ability to focus for extended periods of time. Whether you're a writer, a musician, or basketball player, the goal should be to practice your craft at least an hour a day.
To focus is a discipline. It takes work, just as being happy is a decision that requires consistent effort. It's easy to procrastinate and let distractions come to us so we can appear busy. Busyness often gets confused with checking email or social networking, even if it's just for a couple of minutes waiting to pay at the grocery. You're better off using that dull time to observe, listen, or mull over your own thoughts. Perhaps there's something you forgot to do.
Your mind works like a dishwasher even when you're awake to clean out the crap that's not worth hanging on to. The internet more often adds to the noise and produces little signal. You want a brain that's clear and connective rather than cloudy and chaotic.
The author Neil Gaiman believes that the best way to write a book is to be so bored you don't have a choice. Imagine all the things you could accomplish if you used your time doing the work instead of dreaming about it.