I many cases we need to launch some programs upon startup automatically. In Ubuntu, we can do this pretty easy. I will show you how to add this startup program on Ubuntu 14.04. All current Ubuntu version can do this way.
Open Ubuntu Unity Dash and look for Sartup Application. As you can see below.
Click Add button to add new startup program. On the example above, I want to run plank dock every time Ubuntu start. You can add more applications to this startup program. On the command box, you should type the full path of the program i.e: /usr/bin/plank