Failing is such good practice, but we resist it with every fiber.
I've been paying attention to the "whoopsies" lately and reflecting on what I learn when I make them. Here is a way I learned to look at them differently.
I Made A Mistake In A Calculation.
I was just scratching it out on paper and my logic was excellent, except for the fact that my formula already accounted for needing to only consider RS rows. Last night I knit to my desired number of stitches on Patio Bandana*, only to realize that I had worked over too few rows. Instead of regret, this is where I am on it:
Plus:
I can weigh my knitting and I will know approximately how much yarn I knit in an evening.
I got a post out of it!
I love the yarn, so I am not at all upset about having to spend more time with it.
Minus:
I have to rip that back to the beginning of the increases and rework them at the correct rate.
It will take at least twice as much yarn so it will take longer.
One night of knitting, not lost or wasted, but . . . needing redoing.

Next:
I will weigh my knitting before I rip it out.
I will pay attention to the time it takes me to reknit (it will likely be faster!).
I will redo my calculations.
I can measure a length of yarn used in 2 rows of pattern to see how much yarn I need.
How Did I Find This New Perspective?
In March I purchased Tiny Experiments by Anne-Laure Le Cunff on Libro. It seemed like a really interesting topic and yay, it was a 6 hour listen. Perfect for during my Sunday ironing. It probably took me 5 weeks to get through it since I didn’t listen at any other time. It is read by the author.
Not only was the author’s story quite compelling, and based on her research, but it was such a logical way to get information. I decided to join her paid community so I could run my own Tiny Experiments, but have some external accountability (really not, but committing in public is always good!
I love the Plus. Minus. Next. part. It is probably the piece I have been missing: what did you learn (Plus & Minus) and what are your Next steps. It is recommended that your Tiny Experiments have a time limitation (doesn’t matter what). Even with something as simple as recommitting to my exercise schedule for the balance of July will give me feedback I can use.
By putting my mis-calculation into the format of Plus. Minus. Next. it was reframed into learning and opportunity, not lost time or stupidity.
I love doing Tiny Experiments. I did an ad hoc experiment running OKDC (Open Knit Design Camp). I’ll tell you my Plus. Minus. Next. on that on another day.
* This is the last 24 hours to get Sizzlin’ Stitches at $5. At 9 am tomorrow it will go up to $8 for the collection when the second design, my Porto Headscarf, releases.