When you're on a date, your first mistake might be your last. Having success in dating (and meeting your special someone) isn't rocket science. In fact, its mostly common sense - things you already know or can easily learn. So what's your key to dating success? AVOID making these 9 chemistry-killing dating mistakes:

1. Mailing it in:  when you show up on a date looking disheveled, it sends your date a clear message - they're not that important to you. Dress for success on your date, or be prepared for a lengthy singledom.
2. Chaos theory:  constantly changing your date arrangements (date, time, location, etc.) tells your date that you've got more important things on the go. They'll likely decide they do as well. Make a plan, then stick to it no matter what.
3. Too late:  arriving late for your date - especially a first or second date - makes your date feel awkward. More importantly, it gives them plenty of time to consider other options. Arrive on time. Better yet, arrive a bit early!
4. Low energy:  everyone wants to be with someone who exudes positive energy - be that person & you'll find yourself on a 2nd or 3rd date before you know it.  If you're just not feeling energetic before your date - fake it.
5. Glass half empty:  its natural to want to share something negative or frustrating that happened to you that day - but on a first date, it can be a chemistry-killer.  Tell a funny story, or say how excited you are to see them - but keep it positive & light, especially at the start of your date.
6. Checked out:  checking out your waiter/waitress, or the bartender, or someone else at the restaurant while you're on your date sends a clear message that you're not into the person you're with. On the bright side, you'll soon have plenty of time on your own to check out whoever you like. Good luck with that.
7. Bad body language:  no matter how excited you feel on the inside, make sure your body language is not sending a different message. Be engaged & focused on the person you're with - on a first date, it matters as much or more than what you say or how you look.
8. The last goodbye:  how you end a date often matters more than how it started. Be enthusiastic and considerate - and unless there's zero chance of a future connection, make an arrangement to see them again. 2nd and 3rd dates are a far better time to decide if someone's right for you or not.
9. No follow up & follow through:  whatever you've told your date you'll do (call or text them; set up a second date; go to a movie; etc.), then do it. Being true to your word is a very sexy quality indeed. After all, even if you don't end up being a match - who knows, your date may know someone who's perfect for you!