Past Guys - Don't bring up past guys unless it is asked. And if it is asked then make it quick and move on. No need to go all out in detail and talk about other people you have been with. No good will come of it.
Confidence - Make sure you show some confidence, even if your not a very confident person. I don't mean be full of yourself but guys hate it when their date isn't confident and sure of themselves.
Take Some Control - Take a little control every once and a while by making some decisions. If he asks you where you want to go, tell him, don't beat around the bush. Just like you girls, guys like it when you take control as well.
Be Open - Don't go into the date thing thinking you already know how it's going to end. Keep and open mind and give a dates time before you make some judgments, don't make those after 10 mins.
Be Interested In Friends - No it doesn't mean get with his friends, it means be interested in his friends. Make friends with them. If you show no interest in his friends then that makes it look like you don't like any of them. Your man will love that your taking an interest in his flow.
Talking About Yourself - Don't fill your boy with always talking about yourself. Try to be interested in them. They don't want to hear how amazing you are at every little thing. They don't really care. That will make them less interested more then anything.
Going With Potential - Don't just keep going out with a guy because you feel he has potential. That just means they are forsure not right for you at this time and your just waiting it out because one day he has potential to maybe be ok. If the guy isn't what you want in a person then why stay with them based on him maybe changing in years to come.
Attraction - Just because a guy is hot doesn't mean you and him will make a good couple. Don't base dates on all look alone. feel the guy out for other interests and stuff in common. If you base all your dates on looks you'll be batting 1 out of 1000.
Sharing Feelings to Early - One way to scare a guy is to start sharing the way you feel for him and showing alot of emotion to early. That will just end with the guy thinking your way to clingy. It will scare guys off more often then not. How much time should you give? Thats different in every situation. Get a feel for it. Just don't do it right off the bat.
Too Many Calls - If you call the person you've been hangin out with and dating and you get an answering machine, leave a message and wait for a call back. They will call back if there interested. Maybe they just need time to ponder things. It is risky to keep calling and calling. All that does is renforce that your clingy. They will call if they are interested.
Too Strong to Quick - Ease in to things. Don't come off to strong right off the get go. For example don't go on a date with someone and then the next week take time off work to be with them again. That kind of shows your willing to do too much even after one date. Give it time and play the calm and cool role.