You can stay motivated for longer hours if you are happy and studying without any stress. You should sit at the table with a free mind to study a fresh concept or chapter. You can grasp the concept in a shorter time than you do with a hectic and stressed mindset. You must take short breaks between an hour, depending on your flexibility. If you sit for long hours, take a break and give your mind something else to focus on. Like you eat and drink different food items to remain happy, the same way your mind needs happy and fresh thoughts to work effectively and efficiently. So, boost your mind with positivity and eliminate the negativity around you.