A sure way to ruin a perfect kiss is with bad breath. Carry around some mints or gum, and have one a few moments before you kiss. Offer him one too. Avoid spicy foods, garlic and onions just before. Or at least make sure you're both eating spicy food, so neither will notice.

Non-smokers hate kissing a smoker! It's as gross as kissing an ashtray! You might be nervous, but don't giggle during or after you kiss. The other person won't understand it's nervous laughter. He'll think that you were laughing at him!