quick image resize

Is there any way to quickly resize pictures? In XP I have powertoys which is as simple as right click, resize pictures.

I have Photoshop CS3 and Aperture 2 on my MacBook but I can't figure out a simple easy way to resize to a copy of the picture.

 

heh I know how to use photoshop.

I'm looking for a quick way to resize, like on my XP machines I just get to right click, resize button, and I get copies of the image files the size i want.

I'll check out the preview resizing, that opens quick and sounds like what i'm looking for. Thanks