This has been my main concern over the last few years as well. I'll have to look up the quote, but there was an author who said something to the effect of, "Most artists concern themselves with originality, which they should never bother about. Instead, they should strive for authenticity."
Or how about this, from Rumi:
Be courageous and discipline yourself.
Work. Keep digging your well.
Don't think about getting off from work.
Water is there somewhere.
Submit to a daily practice.
Your loyalty to that is a ring on the door.
Keep knocking, and the joy inside
will eventually open a window
and look out to see who's there.
Keep working. Exert yourself toward the pull of God.
Laziness and disdain are not devotions,
Your efforts will bring a result.
You'll watch the wings of divine attraction
Lift from the nest and come toward you!
As dawn lightens, blow out the candle.
Dawn is in your eyes now.