This is simply basic respect. If you say you're going to call, call. Otherwise shows that you're flaky or you simply don't care.
When out on a date, conversation needs to be a two-way street. So, show her you're interested! There is nothing more boring than a guy who only talks about himself. Make sure to ask questions and be interested in what she have to say.
OK, It's 21st century. So, open the door, buy her a flowers etc.
If you've asked a girl out and it's your first date, be gentlemanly and offer to pay.
Don't play games. Even though it's scary, the most masculine and respectful thing you can possibly do is to be honest. Just be straight up if you don't want to see her anymore.
Nothing drives women crazier than dating a guy who is a total flake. Women love a man who can make a plan and stick to it.
Girls are attracted to a man who can show some leadership. It's sexy, especially during the dating phase. Whether that's setting up the date and picking a place for dinner, surprising her with flowers or leaning in for that first kiss.
I'm not saying that you have to get all dressed up, in fact, sometimes that shows you're trying a little "too" hard. Plus, a lot of women like a guy who can both dress well but also can be a bit rugged. That's just preference. But if you're going to take a girl out, especially if it's someone you're really into, put a little effort into your appearance.
Every girl, and guy for that matter, probably has a story about dating someone who only calls or texts them to "hang out" in the middle of the night. If you could potentially see the relationship going somewhere down the road, than this tip is simple. If it's the beginning phase of a relationship and you're out late with your friends, you're better off going home to bed than calling her at 2 a.m.. Hold off to set up a proper date at a proper time.
So this last statement trumps all the other advice: have confidence in yourself. No matter who you are, what you look like or what you do, just be confident in that. Nothing is more sexy than a man who knows who he is and doesn't make any excuses for it.