Much needed motivation

When I got my paper back yesterday, I was pleasantly surprised at my grade. I doubted myself the entire time I was writing. I have reached that point in the semester where I started telling myself that I didn't care about my grades or work anymore and started focusing on how burnt out I feel. That grade really helped remind me why it is that I am working so hard and that we only have five more weeks! I desperately needed that extra motivational boost. Has anyone else reached that point? If so, where do you get the motivation to power through the last few weeks?