Maybe just two quotes I really love and which always remind me (and maybe others too) to take the job and yourself as a photographer not too serious:
"Look, I'm not an intellectual - I just take pictures." (Helmut Newton)
"There are no reasons for my photographs, nor any rules; all depends on the mood of the moment, on the mood of the model." (Jeanloup Sieff)
You will find more work from Jens Herrndorff at: http://www.herrndorff.de/