I approve of the "generate a shitload of entropy and hash it" method.  The reason I recommended my method is because it could be done with pen&paper, without any external functions.  You can actually get a full hex private key without touching any external scripts or figuring out how to securely/privately execute hashes.  Can be useful in some situations for people with nil programming experience.

But I also wasn't aware that many tools will do the hashing for you.