I used to find myself tired a lot. It was difficult to get a full nights sleep. Here's what I eventually recognized was causing it.

1. I wasn't using my muscles enough.
   Muscle contractions create flow. Without flow, things stagnate and bad things accumulate causing tension.
   
2. I was overusing my brain.
   I was thinking, analyzing, problem-solving and worrying too much. This is a recipe for disaster.
   
3. All this led to a chronic depletion of vitamin D, vitamin B12, iron, omega-3 fatty acids, magnesium, and potassium which causes low energy, brain fog, dementia, and hardens arteries making your heart work overtime.

So here's what I did to fix it.

1. Used my muscles more.
   I did at least 20 minutes of strength training 6 days a week.  When you don't use your muscles, it's easy to accumulate tension. Tension is the #1 culprit to sleep disturbance.
2. Got more sun.  
   If you don't get sun, you don't produce vitamin D. Things go south pretty quickly when you don't get enough sun. Get a minimum of 20 minutes of direct sun. Wear a cap if you're afraid of wrinkling. Wear shorts and tshirt-- expose as much of your skin as possible.
   
3. Took magnesium.  
   This is good to do regardless but on days I don't get enough sun or outdoors, I make sure to take it before bed. Here's the product I take.
   
4. Ate more fruit and drank more water.
   Dehydration often reveals itself as "Tiredness."  Drink 2-3 full cups at once and see if it changes.
   
5. Eat less "Added Sugar."
   Refined sugar leaves you feeling tired all day long. Sometimes for 2-3 days depending on how much you consumed.
   
6. Do the quick 1-minute "Sleep Routine"
   to get a deeper, more rejuvenating sleep.  See below.
   

This is what awakened my mitochondria.  I now have sustained energy all day long.