Here is a quick review of what you can do to recover data from a dead drive. The lack of specifics is simply that the first thing you try is software based. Any software. All the stuff you find in your toolbox and on the web. There are thousands of choices - literally.
This little blurb at The Inquirer is informative and will give you enough of an idea as to what data recovery involves that you can start experimenting on an old drive that contains nothing you really need to save and learn the moves.