Looking back, I wish I had taken the following advice:
If you can wait a bit, try to make sure you really like him and the way he treats you before sex. This gives you a bit of confidence in him.
After each of the first few dates, just plan on not hearing from him. Go on and live your life and don't panic. If he is into you, he will really call. You won't be able to get rid of him.

I always hear about guys who say things like: "Oh, sorry, I couldn't text you as I was traveling." Obviously that is BS. Even if I was working, traveling, or whatever...I could contact someone briefly if I really wanted to. Don't invest your time chasing these types.