Since I work in Linux and primarily code in languages like C and C++ (i.e. compiled langs), I work completely in the terminal, so I don't use any GUI. It's nice and I'm already there for my compiling so I might as well use it for git.

However, re remembering all the commands, there is a nifty website I found a while ago and bookmarked called Git Explorer where you basically choose from dropdowns of what you want to do and it gives you the command(s) for it.