Generally when adding a program to the list of items that starts when you log in to your Mac, you have to go through the Accounts item in System Preferences. Or some programs will give the options in their own prefs. Either way, it can be a little bit of wrestling to get to it.
Perhaps this is a known trick, but I just stumbled-upon it and figured it was something a few people may find handy. Rather than going through the steps I alluded to above, next time you want to add some app to your login routine, try the following.
With the app running, right (or CTRL) click the app’s icon in the Dock.
Select ‘Open at Login’ from the resulting contextual menu.
That’s all there is.
Much simpler, yeah? I like that.
Of course, I should also mention as a warning – the more items you peg to start upon Login, the longer your Mac may take to actually come to a usable state. I try to limit my Login Items as much as possible, but it’s still a good 12+ items in length… Anyway, something to keep in mind.