http://litreactor.com/columns/the-internet-hates-you-five-writing-habits-to-crush

Excellent post on five things which really wreck your writing, and the habits you'll have to crush, if you want to get anything done. Part of No.3 is particularly salutory:

The noise in your head from the internet may be one of the silent killers of your imagination. Instant gratification is the fastest way to lose the craving that leads to art.

but the rest is well worth it too:

Yes, very good esp. about saying 'no'. Thank you!