Make up your own harmonization;
Improvise without consciously copying anyone;
When composing, mix old elements in a new and surprising way;
Try out weird stop combinations (cymbel + tierce + 16');
Transpose a part of your piece in a mode that you imagined;
Come up with the part disposition in your hymn playing that nobody uses;
Play a chorale in parallel fifths;
Start a postlude pianissimo;
Play a minor piece in a major key;
Repeat a "mistake" a few times in improvisation;
Play the piece from the score upside down;
Set up 15 minutes a day to fail in public;
Feels too risky, doesn't it?
And yet, it's exactly what will make you indispensable, the one we can't live without.