I saw this question asked elsewhere, and I’m curious about the answer. How many material income sources do you have personally? Materiality is obviously in the bank account of the beholder, but try to keep above at least a few thousand dollars.
Another question, and you can put it in comments: How has that changed over time? I’ve certainly seen the number go up, but my feeling is that most people have more incomes sources than they did years ago, and more than their parents ever did.