Use the Robert Morris trick: not to say anything unless you are sure it’s worth hearing.
Write something that you would want to read.
Consider the number of people to whom something matters multiplied by how much it matters to them.
Novelty
Say something that surprises at least some people.
Write about something about which you have thought deeply.
Remember that novelty necessitates past ignorance and be appropriately humble.
Correctness
The trick is to be as strong as possible without being wrong.
Precision and correctness are opposing forces.
Be prepared to throw out many strong claims that are false and weak claims that are true.
Strength
Think well and make use of qualifiers.
Qualification is not just a tax paid to avoid falsities but a skill in its own right.
Strength has the downside of being prone to misinterpretation. By being as strong as possible without being wrong, a slight exaggeration can make it appear mistaken.