Hmm I think it has taught me when you're really tired and feel kinda burned out it feels like you need to rest and slow things down. But I doubt that's the answer as you'll feel more lethargic and useless.
So I think it taught me to evaluate what gives me energy (even if it takes some effort at first, be it physical or mental) and which parts of life should go down on the priority list and not worry about them too much. Pick yourself up and get after it again :-)
Yeah man, you have to prioritize.
Use your energy wisely.