I know this tiredness too. I look for things that give me joy. I plant events or treats and trips out in the future like waypoints to home in on. And I have adopted an Acceptance of my situation (stage 4 renal cancer) along side a motto that Anything Can Happen; I may die tonight or in 10 years; because of cancer or despite it; when it's my time I will leave; that moment in time is not my call. In the meantime I try to live a conscious life that I enjoy and am grateful for.