A couple months ago, I was riding my bike home from work and I made some kind of minor interacting-with-other-people-in-traffic mistake (I don't remember now what exactly it was). Afterward, as I rode on, I composed a rueful haiku in my head:
Every day provides
Fresh new opportunities
For making mistakes.
...Alternate version of last line: “To make mistakes.” Which has only four syllables, which I found amusing in this context. But in my experience, making deliberate subtle mistakes to jokingly illustrate making mistakes tends to be misinterpreted, so I went with the above version.
I suppose taking it out of the haiku form altogether results in a slightly punchier version, like something Jack Mantis might have said: “Each new day is a new opportunity to make mistakes.”