Whenever I get bored I listen to some true life stories of how people have overcome personal challenges and really made something of their lives. Check out
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Listening to people like Kristine Lilly and Nico Calabria is a mood booster.
Do you have any competition within classes and the like? This can help your motivation to study if you hear others are studying quite hard. However, this still wouldn't work if you didn't care about your learning at all.