Don't let Solomon stifle your creativity - pick up the Book and get the context of the futility of trying to create some temporal immortality, toiling under the sun. Bearing that in mind, just because it's been said or done before, doesn't mean that your personal touch on something won't make it ring true for someone now.
There's all these inspirational quotes about going for it, you can do it, some followed with an at least you tried (anyone else thinking of Lord Tennyson's famous "Tis better to have loved and lost"?)
But then there's that crystallizing moment, when something you've seen, read, heard, so many times before, suddenly clicks. This quote was it for me when I read it the other day: