RPi - Give me some ideas!

Okay so while I am studying using the Linux academy, I decided to get my self a Rpi B+ to tinker with, and I am looking for things to do with Linux and the Rpi - I want a project which will help me learn Linux and will help towards LPIC level 1, so a project that tied everything together :)

Any ideas?

Thanks!

ideally yes, If I do something different think I will just buy another SD card.