Easiest way for me is to connect my phone to my computer via the USB cable and 'drag and drop' files. You also could remove the SD card (assuming you have one with the files stored on it) and insert it into a card reader attached to your computer.
Exactly what tikibar1 said. And if you connect the phone via USB cable, pull down your phone's notification bar and choose Disk Drive (if it's not already set to that as default). Your photos should be found in a folder named DCIM.