Are you a morning person who’s waking up in the middle of the night? If so, according to a study published earlier this year, the amount of caffeine you consumed during the day could be directly related. Why? It can take hours for caffeine to clear your system and it blocks adenosine, the very thing that tells your body that you’re sleepy. To give yourself the best chance at quality sleep, stay away from coffee, tea, cola and any other caffeinated products following lunch.