There's a lot of good advice already in this thread, and I'd rather not just repeat it all in new phrasing. So, read it and weigh it and take what you like.

And then, when you're done, fire up a console window and unplug your mouse and put it somewhere that's really annoying to get to. Live with this for a week.

This will force you to live your life in a terminal, which means that all those little tasks become commands and scripts and configuration files. You will not have a GUI and you will have to understand how to make stuff work anyway.

Trust me, you will learn fast once you don't have a choice about it :)