Apart from this you can use the Pomodoro technique of study and it is very effective in manitaining the pace. All you have to do is take 50 minute study round and 10 minute break round. Do not do anything except studying in the first 50 minutes and do anything you want in the last 10 minutes. My advice would be to just take a small walk across the house.

Apart from these you can also disable notifications in your phone and that would help you in decreasing the number of checking the updates.

Focus is all in the mind. It depends on how you can control external factors that deviate you from your goal. You need to be strict with yourself regarding distractions. Loss of interest can be one reason why students can get distracted most of the times. If you are always on the phone, initially try watching subject related informative videos and learn the concepts. Slowly increased the time om studies and lessen the time on videos. There is no other tip other than reminding yourself of your dreams. If your dreams cant help you in focussing, there is no other big tip for this.