Are you a tester who spends more time manually creating complex test data than using it? A business analyst who seemingly went to college all those years so you can spend your days copying data from reports into spreadsheets? A programmer who can't finish each day's task without having to scan through version control system output, looking for the file you want?
If so, you're wasting that computer on your desk. Offload the drudgery to where it belongs, and free yourself to do what you should be doing: thinking. All you need is a scripting language (free!), this book (cheap!), and the dedication to work through the examples and exercises.