Retrieving Deleted files

Does any one know the best way to retrieve lost files from a Macbook? I am after a Music project that was completed after many days worth of production & have stupidly deleted by accident whilst doing a merge to my new Mac.

Any light on this would be much appreciated.

Cheers
J

Sorry to hear about your problem.

I haven't read these posts completely but maybe this might help, or this.

Hope this helps;D