The best things in life may be free, but that doesn't mean they won't take time, sweat, and perseverance to acquire.That's especially the case when it comes to learning important life skills.To ascertain which talents are worth the investment, one Quora reader posed the question: "What are the hardest and most useful skills to learn'"We've highlighted our favorite takeaways, as well as a few other skills we thought were important.SEE ALSO:15 things successful 20-somethings do in their spare timeDON'T MISS:The 20 cities where Americans work the hardestEmpathy"You can be the most disciplined, brilliant, and even wealthy individual in the world, but if you don't care for or empathize with other people, then you are basically nothing but a sociopath," writes Kamia Taylor.Empathy, as business owner Jane Wurdwand explains, is a fundamental human ability that has too readily been forsworn by modern business."Empathythe ability to feel what others feelis what makes good sales and service people truly great. Empathy as in team spiritesprit de corpsmotivates people to try harder. Empathy drives employees to push beyond their own apathy, to go bigger, because they feel something bigger than just a paycheck," she writes.Time managementEffective time management is one of the most highly valued skills by employers.While there is no one right way,it's important to find a system that works for you and stick to it,Alina Grzegorzewskaexplains."The hardest thing to learnfor me was how to plan," she writes. "Not to execute what I have planned, but to make so epic a to-do list and to schedule it so thoroughly that I'm really capable of completing all the tasks on the scheduled date."Mastering your sleepThere are so many prescribed sleep hacks out there it's often hard to keep track. But regardless of what you choose,establishing a ritualcan help ensure you have restful nights.Numerous studies show that being consistent with your sleep schedule makes it easier to fall asleep and wake up, and it helps promote better sleep in general.See the rest of the story at Business Insider Click here to read full news..