Some useful links
1) Introduction to Robotics (Free Course from MIT)
This is a free course about Robotics from MIT. This course gives a small introduction to robotics. Course is made for intermediate users(Not that simple to understand if you don’t know mathematics). You can find more such free courses from MIT in MIT OCW.
Learn about Linux Device Driver
3) ARM Projects
4) Learn Git
Know some basics about Git which will become useful in future.