Scholar’s Stage has a long post on why public intellectuals often have such short careers in terms of quality output. Here are my tips for extending your shelf life, noting that I am not myself suggesting I have managed all of these, do as I say not necessarily as I do:
1. Take a cue from Kobe Bryant. As you get older, you have to practice critical thinking more, and harder, compared to when you were young. Most people let up on their practice habits over time.
2. Avoid criticizing other public intellectuals. In fact, avoid the negative as much as possible. However pressing a social or economic issue may be, there is almost always a positive and constructive way to reframe your potential contribution. This also will force you to keep on thinking harder, because it is easier to take apparently justified negative slaps at the wrongdoers.
3. You probably don’t have as much actual influence as you like to think, and besides fame is a mix of benefits and costs. So write to meet your own standards of quality, and no I don’t mean your standards for how much influence you think you ought to have.
4. In your copious spare time, keep on picking up and learning new areas of study.
5. Go to some travel locations you never would have gone to before, and without too many firm plans, so for instance avoid having a full schedule of public lectures.
6. Interact with students, and not just in a “famous person interacting with students” kind of way. The value of having to motivate and explain things to people who don’t necessarily care who you are is high.
7. Shy away from discussion of political candidates as much as possible. “Run away” is better yet.
8. Try not to write things, including tweets, a less analytical and intelligent person also could have written.
10. Hang around happy, cheery people. That said, also have some ornery friends determined to make (intellectual) life difficult for you. You need both.
11. Continue to read some serious fiction, always. Genre fiction has other uses, but most of it doesn’t satisfy this stricture.
12. Be very reluctant to purge your friends and acquaintances for perceived intellectual or political wrongdoings.