The actor's imagination is stronger than emotional exhaustion
Use imagination to build the role without forcing yourself to mine private pain every night.

A central Stella Adler principle is that the actor's imagination is a vast source of work. A script does not require you to reopen a private wound that resembles the character's pain every night. It asks you to understand a world you may never have lived and make it specific enough to believe.
Repeatedly depending on a painful memory can narrow choices and exhaust the actor. Imagination expands the field. You do not need to have been a monarch, refugee, or emergency doctor to play one, but you need research, respect, and the ability to imagine the circumstances from within.
Begin outside yourself. Gather images, sounds, maps, and information about place, period, and profession. Notice how weather, money, class, religion, and social rules shape an ordinary day. Then ask what the character sees on entering, what they expect from others, and what is normal to them but unfamiliar to you.
Use the senses without displaying them. Imagine temperature, smell, clothing texture, the weight of an object, and distance from danger. Choose two or three details connected to the action. Too many details without purpose become distraction.
Imagination is not an escape from truth. It is a way toward a truth larger than the actor's autobiography. It requires discipline: choices consistent with the text, research that resists cliché, and rehearsal that tests whether an image produces behavior.
Build the minute before the scene. Where was the character, what were they doing, and what image remains in their eyes as they enter? Do not perform that backstory for the audience. Simply arrive from it. If the first action becomes clearer, the imagination has done its job.