There is no set of productivity techniques and time-saving “life-hacks” that will make you feel truly “on top” of life. You will never have Enough productivity. There will always be more you will want to do. More you have could jam into your schedule. More things other people want you to do. The only way you could possibly feel sort of “on top” of stuff is to be so shut off from other people that you’ll succumb to loneliness and depression. You have to learn to Love the Process.
The day is not long enough to do everything you might want to do. You should not end each day disappointed that you didn’t get to your 501st task. Do a few things. Then relax. Celebrate your wins. The Perfect Day is not spent constantly producing.
You're not "one simple trick" away from total life mastery. You must accept this.