The vast majority of us want cut-and-dried answers. We want to know what the best supplements are, how much sleep to get, the right amount of water to drink, the best foods to consume in their proper ratios and times, and the most effective exercises and peak times to perform them. We desire to know the “best” (optimum) and “first in order” (prime) information to make our lives productive, rewarding, and free from distracting demands. In this spirit, here are a few answers that are steeped in science.