You've had a really bad day, and you're ready to strangle whoever comes across your path. And that is primarily because you can't strangle the person who ticked you off in the first place (your first issue there being that you'd have to get rid of the body). You fume all the way home. You fume at home. You go to bed fuming. Instead of spending the night in an aggravated fitful insomnia and waking with a headache in the a.m. (whether from lack of sleep or your ill-advised remedies), I suggest you stop at the party store on the way home.
I do not recommened alcohol or crepe paper streamers. Go buy a big box of those little bottles of bubbles they hand out at weddings. (uh, what?) That's what I said, you need a whole buch or those small sized bottles of bubble liquid. When you get home, crash on the bed with a bottle of bubbles in hand and blow bubbles until the bottle is empty.
This works wonders for a sour attitude, and is especially cool if you have a ceiling fan and can find the updraft. With skill you can actually catch a bubble on the wand and use it to blow a whole new batch without dipping it again. Using your creativity, you could easily spend an hour and more finding ways of steering bubbles around the room, keeping them from popping, or aiming them at various targets.
If you could seek them into the office, It might not hurt to keep a bottle or two hidden in your desk, just in case. Every time you take a breath, say a prayer; breathe out slowly; and let your tension, frustration, and anger float away and disappear in dozens of tiny spheres of soap.