The "blanket" trick is something my mum taught me when I was studying for a test in year 3. In Judaism, there are different blessings for different food categories. Some are specific (to veggies, fruits, etc), and some are like "blanket" blessings that you can theoretically use on all foods. I always really like that idea, and how it could apply to so many other things.
Sorry to get off topic:
Step 1) Count to 10 first. It actually works. If it doesn't, keep counting until your head is cleared – to 100 if necessary.
Step 2) Keep being angry. When you put a clear head with a bit of anger, you will get the "sharp" effect that you are looking for.
Try this on a certain recent guest to your message board – it's long over-due. As I'm sure you've realised by now, his arguments are full of holes. He should be easy, and you can practise the cool-headed anger trick.
SW