1. Sing

As if you need another reason to belt out some Adele! Researchers in London found that singing increases energetic arousal and decreases tension almost as much as a cardio workout, according to Prevention. WebMD says it gives you an emotional high while reducing stress hormones. Consider saving this one for outside the library.

2. Massage your ears

This has to do with stimulating acupressure points. According to Reader’s Digest, ear reflexology goes back to traditional Chinese medicine. By rubbing your ears, you will increase blood circulation and therefore  boost energy. It is suggested to pinch the rim of each ear and rub up and down for 10 to 30 seconds.

3. See red

One study done by the Lighting Research Center found that red light helps to increase alertness in the afternoon, which is often the time people start to lag. Researchers believe the color red increases receptiveness to external stimuli, which could affect a person’s emotional and motor responses, according to The Wall Street Journal. Another study found that the color makes muscles move faster and work harder, giving a burst of energy, according to Health Magazine.

4. Chew gum

It’s not just for blowing bubbles. A study found that those who chewed gum for 15 minutes felt more alert than those who didn’t, according to Prevention. Andy Smith, who has a Ph.D. in psychology, and the author of the study, said it increases heart rate, which increases blood flow to the brain. It also increases alertness by stimulating the autonomic nervous system, which is the part of the nervous system that regulates the body’s involuntary functions like breathing and heartbeat, according to Medicine Net. Reach for mint gum in particular, as it arouses nerve fibers.

5. Laugh

According to Everyday Health, a good chuckle acts like a big stretch for your body. It helps to speed up circulation by tensing and releasing muscles. Your breath also quickens, which helps to send more oxygen to the brain. This is your scientific excuse to take a break from studying and watch a few Vine compilations.

6. Tap your thymus

It’s located in the center of your chest below the collar bone and above your breasts. When tapped, it triggers the production of T-cells, a type of white blood cell, which boosts energy and relieves stress, according to Shape Magazine. Marian Buck-Murray, a nutrition coach, recommends tapping your thymus with your fingertips for 20 seconds while taking slow and deep breaths.