As I mentioned in my first January post ( Swimming Away from Toxicity? ), I moved this newsletter from Substack. It's a long story; just read that article if you didn't see it.

You might now be saying, "I didn't see that! Why did it not make it into my inbox?" You may not have seen the three prior messages for 2024 as the transition didn't go as smoothly as I hoped.

So here is how you can help:

  1. If you get this in your inbox, please just reply. That's the best way to make sure you keep getting updates from me (Mark Kilby) via the Differability newsletter. If the reply bounces, just forward to mark at markkilby dot com. If you are feeling ambitious and want to try out a feature of Ghost, also click the Comment button at the end of this message.
  2. If you didn't get this message, check your spam folder and look for an email from (Yes, I'm hosting on Ghost; more on that later). Be sure to mark the email as NOT spam and add that email address in your contacts. That's another way to tell your spam filters that this is an email address you want messages from. (At least I hope so.)
  3. If none of the above worked and someone forwarded this message, go to and click the Subscribe button. That button should be on the upper right when you visit the website. For mobile, you see it in the upper right menu or click the "Sign Up" button at the end of the message. You should get an email within a couple of minutes to confirm. If you don't confirm, you will not receive updates. We both might be sad about that outcome.

Hope this works for all of us. 😄

I look forward to sharing future messages such as how to leverage AI for job fishing.

Mark Kilby

P.S. If you want to read the three prior messages from 2024, just go to to see them.