Seek out bright light—ideally, natural sunlight—as soon as you start to feel sleepy. If that isn't possible use bright artificial lighting instead. This tells your brain it's time to be awake and attentive and helps restore your circadian cycle.
Dehydration is a big cause to tiredness. Keep a water bottle reachable and sip on it regularly throughout the day. Cold water can be particularly refreshing and help you feel more awake. Aim for constant consumption rather than gulping down huge amounts occasionally.
Avoid long periods of sitting. Every half hour, spend a minute or two getting up and moving around. This may include standing up, stretching at your desk, or simply taking a short stroll to the printer. Engaging in physical activity stimulates your body and promotes blood flow.
Avoid processed snacks and sugary treats, which cause quick energy spikes and crashes. Instead, choose snacks that give you sustained energy, like whole-grain crackers with healthy toppings, yogurt, nuts, seeds, or fruits, which stabilize blood sugar levels and avoid energy dips.
When used properly, caffeine can be a helpful aid in the fight against drowsiness. Eat no more than one or two servings, ideally in the morning. Be aware that too much caffeine can cause jitters, anxiety, and sleep disturbances later on, resulting in a vicious cycle of excessive daytime drowsiness.
Using a standing desk for some of your workday can help fight tiredness if your job allows it. Compared to extended sitting, standing improves circulation, boosts energy levels, and helps sharpen focus. If necessary, switch between standing and sitting.
Getting some fresh air by going outside for a little while can help fight off drowsiness. Your senses can be awakened and your mind refreshed by the fresh air, natural sounds, and change of scenery. A quick stroll around the neighborhood can have a significant impact.