It's amazing how quickly Valentine's Day can go from a day of romance to an event never to be spoken of again!

Most of the time all the mistakes that lead to a bad Valentine's Day can be avoided with good planning.

Here are some of the most common mistakes from Guyism.com.

1. Forgetting to Make a Reservation. If you're going somewhere nice for dinner and assume you'll just walk right in . . . it's time to start panicking. You might eventually get a table, but you'll end up waiting 45 minutes which can put a damper on the whole night.

2. Giving Her Stripper Lingerie. Something sexy is fine, but some guys go way overboard.  Anything vinyl or crotchless is risky.

3. Constantly Complaining That It's a "Hallmark Holiday".  Yes, everyone knows that Valentine's Day is just a way to sell more greeting cards and chocolate.  So don't harp on it all night.  You'll just look cheap.

4. Buying Her a Last-Minute Present at the Nearest Drug Store. If she finds out, she'll be insulted by the cheapness of the gift, and because you didn't plan ahead.

If you completely forgot about Valentine's Day, you're better off buying a bouquet of flowers at the grocery store, and maybe a bottle of wine.  Just make sure you take the price tag off the flowers.