1. Go for a quick walk
Going outside and exposing yourself to natural light prompts your body to reset its internal circadian rhythm for a new day, giving you an energy boost, according to the National Sleep Foundation.
Plus, a wealth of evidence shows that walking keeps you healthy. One study of about 72,000 women found that three hours of walking per week cut the risk of heart attack and stroke by about 35%.
The best part is that it's totally free and only requires a pair of shoes.