I know its obvious, but a lot of people forget (or never learn) the basics. Myself included. People aren’t going to like you if you don’t like yourself. Once you have that sorted, and I’m not suggesting that its easy to do. If you want someone to take an interest in you, take an interest in them, get him or her to tell you about themself, people are egotistical so use it to your advantage. Also gives you a chance to find out if you really are interested in them or not.