To regain youthful energy/creativity, you could try increasing testosterone. Even topical pregnenolone + DHEA (5 mg : 5 mg) along with a multivitamin + D & K + chelated/TRAACS magnesium supplement may be effective. Given your age, there are also anti-aging benefits. Iodine protocol. MSM lotion.
Would execution ability have been sufficiently improved by reading/observing more? What makes you now better at executing?