People talk about time management all the time. But I think, energy management is just as important as time management for working smarter. I wrote a post on the topic of energy management a while back which you may like. Check it out here: https://medium.com/the-mission/the-ultimate-guide-to-managing-your-energy-on-purpose-so-you-can-thrive-at-work-and-life-6932a871f504