How can you stay Up awake for longer
First notice, that sleep deprivation is not healthy and can be the cause for a number of health issues. So make sure to get the sleep you need. If this is generally the case and you want to push yourself because you need to get something done you can do so by exercising, taking a cold shower or exposing yourself for a short period to the cold or taking caffeine, e.g. through consuming caffee or black tea.