With one new exception (food delivery), I still tip/no-tip with the same basic policy I've always had.

If there's individualized face-to-face service involved where even a small conversation is required, I tip unless the service is grossly negligent.

If not, I don't tip.

  - Restaurant servers, hosts, and bartenders? 20% minimum
  - Barber? 30% minimum
  - Tailor? 30% minimum
  - Movers, Skycaps, & Maids? 25% minimum
  - Food Delivery? Now no.
  - Point of Sale? No.

Growing up, I used to generously tip all pizza drivers, but that's changed with the advent of ubiquitous food delivery apps like Grubhub and Instacart where there's a middleman between you and the business that made the food.