Just discovered this great little utility from Pixelab Inc. Succintly described as xcopy on steroids, it's a command line tool with a huge array of options. What I like is this one:
XXCOPY M:\SOURCE\ E:\DEST\ /CLONE
which synchronizes a destination directory with a source directory ignoring files that haven't changed and deleting files no longer in the source. It's a much easier way to backup my data files - especially my photos and music. Just gotta put a few of these lines in a batch file for a dead simple backup method.