In the Army when pushed to the limits of physical exhaustion one could find a source of reserve energy by shouting out encouragement to others. This might help sustain you in the short term.
Sometimes loss can serve to regain attention that had been diverted to the superficial and allow a time of discovery of what is more essential. I do not know if this is the case for you, but you might want to explore family relationships that may have been neglected, people who still care about you even if do not have what you did previously, or if you had faith before, you might try to rekindle it.
Sometimes an upheaval can open an opportunity of time that might be applied to discover an interest such as reading, cooking, drawing, music, or an activity that opens an opportunity for meeting new people.