Future-proof your career with the help of these $20 course bundles

Picking up a new skill can open you up to more opportunities, grant you a fatter paycheck, and make you indispensable at work.

And the good news is you don't have to go back to school just to acquire new skills. You can start with these online training course bundles. As of Oct. 17, they all only cost $20.

**The Microsoft...