The industrial age has raised the bar of self-appreciation to the productivity of machines. The thought aside that machines in the so called industrial societies have also freed a large number of people from occupations too time consuming and tiring to leave space for education and/or leisure activities (making the pursuit of art an occupation for the privileged few and the occasional madman/madwoman), machines brought with them universal time and a machine productivity bound concept of human work ethics. The human mind will bend to see these demands fulfilled but it will not naturally behave that way. Especially creative work cannot be entirely synced with machine time cycles – and if it is we often perceive the results as disappointing and non-original. For artists who spend a good deal of their time alone chasing the next image or fictional character I think it is especially important to not bind self-confidence to the adaption to office/machine time.
Whether I am already procrastinating or still thinking and waiting: I have to find other parameters to establish that fine line for myself than to check off office-suite calendar time slots. The most important defense against external (and possibly: internalized) criticism referring to your use of time is your own confidence that you are indeed working when you are giving yourself space to let the idea, the character develop.