When you're just starting your career, you need all the help you can get managing your time. Even when you're working hard, you could be wasting a tremendous amount of time either by trying to multitask or by focusing too much on minute details. Montreal-based designer Étienne Garbugli has struggled with all of that. But as he's gotten older, he's learned how to manage his time and workload more effectively. Today, he's a consultant and entrepreneur, and recently published his first book, "Lean B2B: Build Products Businesses Want." Last year, he collected some of his favorite lessons in the SlideShare presentation "26 Time Management Hacks I Wish I'd Known At 20." In December, SlideShare named it the "Most Liked" presentation of 2013. Below, we've explained some of Garbugli's best time-management tips everyone should learn in their 20s. 1. There's always time. Time is priorities. You never "run out of time....