Focus and focus but sometimes it's quite hard to concentrate for a long period since i easily get distracted by Youtube
I usually have my to do list send me notifications with priority to dos I’ve already set up attached to times during my working hours. This allows me to make the most use productively of my time.
Minimise distractions. If you are studying make sure you will have no one disturb you, put your phone on airplane mode, focus in the task at hand (I practice meditation that teaches focus to help focus and concentrate on tasks)