Only if you’re MacGuyver. For everyone else it makes you look like a psycho. Unwanted attention from the ATF isn’t cool.
I’m more “awesome” than “cool”, but I’ll give it a shot:
Music, movies, videos?
Having good taste in these things is cool.
Being a movie or music snob is not cool.
A geekish devotion to a particular genre or film is also not cool.
Trends, ideas, neologisms?
Following trends is not cool. Incorporating elements of trends seamlessly into your lifestyle is cool.
Websites, technology, gadgets?
Gadgets are cool. Owning gadgets does not make you cool.
Games, toys, pastimes?
Anything involving sports, drinking, music or the opposite sex is cool. Acting like you are cool because you do these things makes you uncool. (ie it’s cool to sleep with a lot of women. If you talk about women you slept with, picking up women, or how hot that girls ass is, you are a douchbag)
Fashion, style, grooming?
The trick is to look good without looking like you thought about it all that much.
Any other area?
Career
The more successful you are while maintaining your own individuality, the cooler you are.
Leading is cooler than following
Car
Your car should fit your personality. If you drive a car that looks too cool for you, it looks like you’re trying too hard which isn’t cool.
Asskicking
Giving someone an asskicking who truly deserves it is cool
Basically, the general theme is that you want to “be” cool, not “act” cool. You do thinks because that’s the way it’s supposed to be done, not because it’s the trend. Cool people don’t try and they don’t need to prove how cool they are. They just “do” and people automatically know.