Running script upon login in mac OS X

I am wondering if anyone is able to help me out with getting a shell (.sh) program to automatically run whenever I log in to my account on my computer. I am running Mac OS X 10.6.7.

I have a file "Example.sh" that I want to run when I log onto my computer. I do not have a problem running it when I am already logged in, but I want this to run automatically.

Follow this:

• start Automator.app

• select Application

• click Show library in the toolbar (if hidden)

• add Run shell script (from the Actions/Utilities)

• copy & paste your script into the window

• test it

• save somewhere (for example you can make an Applications folder in your HOME, you will get an your_name.app)

• go to System Preferences -> Users & Groups -> Login items (or System Preferences -> Accounts -> Login items / depending of your MacOS version)

• add this app

• test & done ;)

EDIT:

I've recently earned a "Good answer" badge for this answer. While my solution is simple and working, the cleanest way to run any program or shell script at login time is described in @trisweb's answer, unless, you want interactivity.

With automator solution you can do things like next:

so, asking to run a script or quit the app, asking passwords, running other automator workflows at login time, conditionally run applications at login time and so on...