Drink Half Your Body Weight in Ounces of Water Daily

The Problem

You're tired all afternoon. You have headaches. You drink maybe 3 glasses of water per day.

The Hack

Take your body weight in pounds, divide by 2 = daily ounces needed. 160 lbs = 80 oz = about 5 standard water bottles. Carry a water bottle and refill it throughout the day.

Why It Works

Even 1-2% dehydration reduces cognitive performance by 25% and physical performance by 10%. Most people are chronically mildly dehydrated and attribute the fatigue to other causes.

Pro Tips

• Carry a 32 oz water bottle — refill it 2-3 times
• Set phone reminders if you forget to drink
• Urine should be pale yellow — dark means dehydrated
• Coffee and tea count partially but plain water is best