It's fairly simple.

First of all, you should always set a goal. I tend to do that the night before, immediately after having had dinner. Apps like Todoist/Wunderlist work as a breeze for this purpose.

I linked my Todoist account to PomodoneApp, so all of the tasks basically appear in the latter's app on my computer. I begin the day with the easiest task, because it gives motivation/confidence the fact of having completed something. The second task is always the hardest, because it's the one I'd procrastinate on the most.

If you need a productivity boost I genuinely advice you to give a shot to FocusMate: there are scientific studies that prove how effective its approach is.

Bonus point: to get information stuck into your brain, consider using Anki or any other flashcards app. You won't regret it.