Exactly.

Not too long ago the combination of child, work and school forced me to completely re-evaluate how I was spending my time and what is actually important to me.

One big change I ended up making was getting to bed at the same time every night and clocking a consistent 8 hours.

Within a week or so the difference was remarkable in both my mood and acuity through the mid-afternoon - ideally I'd take a 45 minute nap around 13:30, but that's not an option with my current job.

In order of effect, the best things I've ever done for day to day clarity:

1.) Going to bed and rising at consistent times with 8 hours inbetween.

2.) Drinking plenty of water. At least 8 ounces per waking hour for me.

3.) Regular exercise. I feel best lifting weights 3 or 4 days a week, but I expect the specifics are less important than simple movement and exertion.