Start with hot water to cut down your cooking time

Bringing the contents of the pot up to a high enough temperature and pressure takes up a significant portion of the total cooking time for pressure-cooked items in the Instant Pot. Therefore, it stands to reason that adding your liquid to the pot while it's already hot will significantly cut down on this time. A decent kettle or even a pot on the stove will boil water more quickly than an Instant Pot, yet the heating element in an Instant Pot will undoubtedly perform the job of warming up your meal.

This assumption is supported by a Reddit discussion. One commenter adds that before beginning to cook under pressure, you may even pre-heat your liquid using the sauté feature. You can start heating your broth, water, or whatever while you prepare the other ingredients for your dish, which could be a great way to multitask.