What or who is this mood about?
What is the narrative you tell yourself while in this mood?
Is it based on an assessment or assertion?
If it is based on an assessment, is it grounded or not? What standards are you using? Are they shared with other people, coworkers, etc.
If it is based on an assertion, is it true or false? If true, what is it going to take for you to accept this? If you realize that it is based on a false assertion, does your realization begin to shift your mood? If not, is your negative mood really about something else?