I've had days that I set aside for blades, and when the circled day came around on the calendar, I just couldn't do it. I could cut out stock or wire together a billet or something, but actually shaping a blade in any way just made me nervous. I've also had days when everything turned to poopoo. Things that I know are well within my capabilities just weren't happening, and that's when I know I have to set it aside and go play HALO for awhile or something.
The good news is, it goes both ways. I stole an hour a week or so ago because I just HAD to get out to the shop. I made a stock removal knife that hour, ready for heat treat. For a beginner with as little shop time as I get, that's a big deal. I just try to remember that even the most technical of us are really still artists, and we have to follow our muse, finicky as she may be.