10 online courses that can teach you something useful for $15 or less

Are you waist-deep in that Q4 funk? Feeling like you're stuck in a professional rut? Well, to quote Sam the onion man from Holes: We can fix that.

For a limited time, the Mashable Shop is having a sale on a set of ten practical courses listed below. Think of it as an early holiday present to your career.

Here's the scoop:

Neuroplasticity: How To Rewire Your Brain

Yes, you can actually rewire your brain. No, it doesn't involve some fancy-schmancy Inspector Gadget-like procedure. All it takes is a little knowledge of neuroplasticity, or the brain's ability to change and reorganize itself by forming new neural connections. In this 30-lecture course, you'll discover how to eliminate toxic habits, fulfill resolutions, learn new skills, and even edit memories using the power of brain training. Read more...