Lesson learned: make completely new copies of your MS after it's been critiqued by someone. I don't know how I did it, but when I copied and pasted edits into my MS I ended up deleting a chapter. Thankfully, I had a version of that chapter from a couple weeks ago, but I can't remember how much I might have changed since then. Oops.
What else have I done recently that's been a bit absentminded? I had to re-write a certain part of a chapter twice because it didn't save. I still think my computer was doing something funky there though and it wasn't my fault in not saving.
Let's see...I've torn up a piece of paper I thought I had copied all information and ideas off of, but actually hadn't.
I've also left a book I was using to research on the floor right where my dog could eat it up. Thankfully she's grown out of that stage of her puppy-hood. (The same day, she also chewed up my boyfriend's mother's book she was lending me. Ugh).
I thought I left my idea notebook at work last week, before the start of spring break (I teach twice a week an hour from home), but it was actually stuffed under the seat of my car. That about gave me a heart attack. I carry that thing with me everywhere I go.
At least I've never lost an entire MS. My computer crashed last year but I had already saved everything to the internet, a flash drive, and a hard drive. It never hurts to be prepared.
What silly mistakes have you made in your journey of writing?