Fatigue, discomfort, discouragement are merely symptoms of effort.
I'm making a great effort because sometimes life is not enjoyable. Sometimes it's painful and sometimes it's stressful, sometimes it's agonizing even, so I think once you get around those humps: strive for pleasure and peace.
Still, it can be more effective to accomplish what you need to accomplish with the minimum effort. Watch Anthony Hopkins. He doesn't appear to be doing anything. He is so still that you can't see him working, but you are drawn into his character through his very stillness.