Exposure to nature restores the mind. One study showed better working memory scores for people after a walk in a natural environment, but not in an urban setting.

If you are unable to go into nature, find plants, fresh air or a fish tank. Sit down, take a deep breath, and notice the details of nature. Research shows that even looking at some pictures of nature can work.

Have a moment with 'nothing to do'. Letting our minds wander without focusing on a specific goal, allows the brain's default mode network to take over and give some prefrontal cortex functions a rest.

Practice mind wandering by keeping your phone in your pocket. Sit alone for 10 minutes, take a breath and let your mind wander. It can also be practiced while you wait at a train station, or in an elevator lobby.

Do 20-20-20- eye breaks to alleviate eye strain and fatigue. Every 20 minutes, stare at something 20 feet away, for 20 seconds.

Doing this requires blood to flow to brain areas that are not related to sustained attention. It may be the reason why eye exercises are restorative.

Laughter increases heart rate, respiration, and gets our blood pumping. Short term effects show some improvements on memory tests.

Spontaneous laughter and forced giggles all have the same perks. Listen to a comedy podcast or read the comics section in the newspaper during a break.

Short bursts of exercise are helpful for cognition. Just 10 minute of physical activity can increase attention and memory performance.

Find a private space, do some pushups or planks, or take a brisk walk around the block.