Look at the screenshots:
Screenshot 1 will let you see the startup applications pannel.
Screenshot 2 will let you see the correct command.
Screenshot 3 will let you see the correct part to the skype applicatoin ()
The way to find a command for an app is a good question. FIrst you need to see in terminal, type the name of the program, example and if it cannot find the command it means that it is another command, also try to find the program using the aptitude application in terminal.
let us say you would like to install cairo dock. Well install aptitude
then search for the app:
sudo apt-get install aptitude
there will be quite some data available. you can install cairo dock using:
sudo aptitude search cairo | grep dock
and launch it using as a good training play with the compiz, and install it from terminal using the above ethod i just mentioned.
sudo apt-get install cairo-dock
As a hint, sometimes you will not be able to filter using grep because you are not sure what you are looking for then you need to look theough the whole search output. if there is a long list try
The less command will sve your life as it will output just as much as you can see on the screen. hope this helped a bit, and from here on it is reading and playing in the terminal. None of us have our heads as junk containers, meaning that it is meaningless to try and memorize the starting command of every program, just the way to find it
sudo aptitude search cairo | less