In a similar fashion, whenever I have a painting effort that supremely tanks I will paint a simple gestural thing that will improve my mood...that way I won't be ending the painting session on a sour note. (simple gestural thing above).
I've been oil painting for about five years and on some days it can be just as frustrating as it was in the very beginning. Prior to painting the gestural painting above I "wasted" an hour on something that wound up a "scraper". Time painting is never wasted, of course, although when there is no finished product it might seem that way. We all have off days. I worry about others who experience this in the first year of painting...they are apt to give up. (I read a statistic somewhere that oil painters often stop painting during the first year, and they do not return!) Well...I will never give up. Nevah! And no one else should give up either!...if you hit a bad shot at the end of the day..just hit some more until you can finish the practice session on a decent shot. That's my unsolicited advice-of-the-day sports metaphor.
Painting: Celeste Bergin, Figure, Oil on gessoed hardboard, 8x10 inches. ©2010.