You should order 1 Wine's e-book and start reading his blog (after you finish reading mine, of course!)
Joe Roberts, writer of the wine blog 1 Wine Dude, has written a useful, fun companion to his blog; an e-book called "How to Taste Like a Wine Geek". It's a fast read (about forty-two pages printed out) with succinct information about how to taste wine, what to look for, and how to really determine which wines suit your palate best.
Joe starts the book by telling us a little about his journey from wine ignorance to wine expertise (hint, a couple of girlfriends play a role), and realizing that with a little patience and an open mind, one can begin to unravel the mysteries of this centuries-old beverage.
He reminds us to think about everything we taste, every day; this will give us the skills to better describe the wines we try. If you are beginning to make wine a more active part of your meals, focus on which wines you hate and love, leaving aside the ones in the middle for now. The wines which leave the strongest impression in both directions are the best starting points for further exploration. It's also easier to put descriptors on wines that hit you with that strong a feeling, positively or negatively.
Joe also discusses the aromas in wine; and the importance of swirling and sniffing in order to discover these hidden treasures. He walks us through a sample tasting; this process is one I need to practice more consistently.
He doesn't seem to be too concerned with assigning a number to a wine; just knowing if you love, like or hate it, along with some sense of why, will start you on a journey that will enhance your dining experiences and probably your social life too!
Using his scale, I can confidently state "I Love It!" when reviewing 1 Wine Dude's e-book. You can download it from his web site for $7.95.