Because your software should be boring and not interesting, simplicity is something you must actively work towards.
Whilst simplicity sounds easy, it often requires you to take a step back and simplify the proposed solution. A great way of doing this is by iterating over your implementation, following the principle of least surprise.
It is often a forgotten, unnoticed and unappreciated skill, that will also wither without exercise.
You can only simplify so much, after a while you will hit a limit, this is the irreducible complexity
Some things you could simplify
- Your backups.
- Unit tests.
- Your product it should be simple and easy to use, and try to summarize it in one sentence.
- Your Dungeon and dragons campaign hook and session preparation.