Want to look the part? The smart part? Wear glasses.
Here are three additional things you can do to appear to have a high IQ.
1. Use a your middle initial...or use two. Think George R. R. Martin. We know he's a smart guy even if we haven't read his books.
2. Don't hold a glass of wine, a beer or any adult beverage. As soon as you have an alcoholic drink in your hand, you appear less intelligent, even if you aren't drunk at all.
3. Vary the speed, volume, and pitch of your voice.
Good luck, smarty pants.
You can see the rest of the list here.
~Roxanne R. L. P. Q. Wilder