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 or practicing Test driven development.
It is often a forgotten, unnoticed and unappreciated skill, that will also wither without exercise. Another unappreciated skill is Glue work.
Some things to simplify
- Your backups
- Unit tests
- Your product, try to summarize it in one sentence.