[Magnum]

Well, you already did it, but here's what you should have done:

First, you're gonna want to define an action, like Zone said. Find a tutorial for the details, but basically, you're gonna record the steps you take (resize, brightness, etc.) and have that as an action.

Then, the important part that will actually save you time is batch processing. Go to File > Automate > Batch... You're gonna want to choose the action you just made, and the directory with your pics in it. Select the other options you want, and let it run.