I say, "Tough luck" because those aren't time-sucking emergencies. Really. They're just not. If you've got time to Tweet, or post on Facebook, or watch Dancing With the Stars with those "life got in the way" moments, you could have been writing. Being a successful writer takes more than just a great idea for a story or two. You're not even a successful writer because you've published a story or two.
A successful writer is devoted to the craft.
A successful writer would rather write than do just about anything else.
A successful writer makes realistic goals and reaches them.
A successful writer is not distracted by new ideas, the latest gossip on the Web, or American Idol.
A successful writer guards her reputation as an author by remaining professional at all times.
A successful writer treats her writing as a responsibility and a passion.
Now if you'll excuse me...I'm on deadline.