Right now, you’re probably thinking, "Twenty-five minutes of work? That’s nothing! This is gonna be easy!"
Actually as someone who mostly formed my study/focus skills during the age of distraction (Facebook, SMS, YouTube), I don't think this is trivial at all.
If I were to go all in on the Pomodoro Technique, I'm pretty sure have to start training myself from just 10 minute undistracted work sessions.