Doubt. It creeps up on us out of nowhere and makes us feel like we're not good enough. This happened to me recently. I wrote a manuscript that my agent loved. Her comment was, "You nailed it!" Great, right? Yes and no.
I was working on another WIP when her comments came back to me. At first I was so excited. Then doubt set in. Can I write another MS that's just as good? This isn't the first time I felt this way either. After getting my book deal for Touch of Death, I thought, Can I do it again? What if this was a fluke? A one-time thing?
So what did I do? I kept writing. And some days I felt like what I wrote wasn't my best. But other days, I got back into the zone and lost track of the hours as I just wrote. We all experience doubt, but we can't let it stop us. We have to push through, even when we feel like we aren't writing our best stuff. Keep writing. You will hit that groove again, and you can fix any sub par parts during revision.
When was the last time you had to kick doubt to the curb?