Caffiene 

You may prefer to guzzle down large doses of strong coffee when you're tired to become rejuvenated.

But, it is better to sip your coffee slowly throughout the day. The higher effectiveness of sipping coffee slowly to stay energized has been proven by a Harvard University research.

Hydration

Proper hydration is good for your sleeping system because it allows your blood to oxygenate your body better for your deep sleep to be more physically recharging.

So, make sure you drink adequate quantities of water.

Lemony

A new study has found that sniffing something lemony helps people (actually women) feel peppier. The scent apparently increases production of norepinephrine, a hormone associated with energy.

Exercise

The body temperature drops when you feel sleepy (and when you sleep.) Regular exercise helps the sleep system because, it helps our body temperature rise quicker and peak at a higher point.

Thus, regular exercise delays the body temperature drop in the evening and makes you feel more energized (when you would otherwise feel sleepy).

Carbs

The fiber in whole grains like brown rice and whole-wheat bread (which are low glycemic index carb foods) provides a long-lasting source of energy for your brain and muscles.

On the contrary, metabolism research has shown that simple carbs (high glycemic index carbs) like sweets will give you a quick rush but leave you tired later.

Light Intensity:

When we're exposed to high intensity light, our body temperature increases and melatonin (a sleep-inducing hormone that induces sleep) levels rapidly decrease. Exposure to natural sunlight also delays the temperature drop. This allows you to stay awake and alert for longer periods of time.

Remember, lack of sunlight results in higher melatonin levels, which leads to lower body temperature levels, sleepiness, and weariness throughout the day.

Funny

So, when you need to stay awake and active for long periods of time, make sure you watch a funny online video and laugh at a guy flying off a speeding treadmill to get your energy back.

Breathing

Deep Breaths and some physical activity - oxygen to the brain. This helps you avoid feeling sleepy. 

A low-intensity workout like a short bike ride can boost energy levels by 20 percent, a University of Georgia in Athens research has indicated. Regular exercise also improves sleep-so when you do hit the sack, you sleep more soundly and wake more rested.

Power Naps

It takes about 45 minutes to enter the first deep-sleep phase. If you limit your nap to a max. of 45 minutes, you will sleep mainly in Stage 2 sleep. Stage 2 sleep also plays a major role in restoring physical energy.

So, a short 30-45 min. power nap will help you feel energized and raring to go when you wake up. However, if you take a nap for longer than 1-2 hours, you will enter deep sleep.