Important Phone Calls. You're already in the mood to snap someone's head off. Don't tempt yourself to snap at that big potential client! Don't cancel a call, but do try to move it to another time, or opt for an email conversation instead. Your tone of voice might be calm and professional in writing even when you are feeling frazzled.
Important Discussions with Co-workers. We're talking about the hard conversations that make you even more tense than you already are. Wait until your emotions are under control. You can say something like, "I'm having a busy day, so can we talk about this tomorrow instead? I want to give you my complete attention."
Reply to Messages that Make You Want to Scream. Being peaceful and professional can be next to impossible when you're boiling over with angst. Let the email sit if you can. Wait until your judgment (and your patience) is back in its rightful place.
Decision-Making. Yes, there may be people waiting on your decision, but is this the right time? If you can, put off the decision for a better time.
Finish an Important Assignment. Get a deadline extension if possible. You're not doing your best work today, so be realistic about how your mood affects the quality of your work.
Run important decisions and assignments past a third party to check for mistakes or oversights.
Stick to your notes. Don't try to do any off-the-cuff improvisations today.
Write an email, save it as a draft, and then step away for a few minutes. Come back and read it with fresh eyes before clicking the Send button.
When you're dealing with your boss, it might help to be honest about your day. He might be more understanding than you think.
If interested in learning more about this and related topics, visit the Career Advice and Productivity sections of our blog.