You could plan every day in advance. You could plan your life in advance. But most of the fun in life comes unplanned. Even a planned prank works out funny because the person being tricked wasn’t prepared (hadn’t planned). You watch Federer because though you and I know he’ll be showing his class, even God doesn’t know whether he’ll win.
And school days were never interesting, because you knew your teachers, you knew your textbook, you knew what was going to happen, you knew the future.
When you plan, you may feel comfortable in catching what life throws at you, but you will never feel the fun.
So, if you feel like you aren’t having enough fun in your life, don’t plan your tomorrow.