Do I hear a mumbled "Yes!"
I know that I've sat staring at an unsold work on my living room wall debating ..leave it and just go from here, throw it out, hide it and pretend it was from your first year of painting....or learn from it. Unframe it,
rework it, draw on it, wipe out whole areas . Use this effort to move forward and rejoice that you have come a long way ....at least far enough to be your own critic! This is YOUR painting until it is sold.
Start out 2015 with a look back and then go forward. Grab an old canvas and use it as a starting point to prime the work to come......Happy New Year!