1) DOS experience helps a lot though optional
2) Learn your way around the console or command prompt.
3) Do not resort to re-installing. It doesn't help in UNIX/LINUX.
4) Blam people if you can not get the program/device running to the way you want it. Then get back working on it.
5) As a user poke through each directory. Its the only way to learn the OS.
A good mental health professional.
I fired mine when I switch to LINUX.