The little things can make a big difference when you’re running your own business! Entrepreneurs know this well, which is why they’re always on top of finding ways to save time and manage their calendars more efficiently. In his research on productivity and time-management best practices, Kevin Kruse, author of 15 Secrets Successful People Know About Time Management, spoke with more than 200 billionaires (including Bill Gates), Olympians, straight-A students and entrepreneurs to learn about their most valuable tips.