If you run into resistance with a girl, instead of plow through, step away a moment... to let her fix her resistance herself.
Usually when you meet a girl, you don't want to leave her. If you leave her, she might leave herself! Some other guy might dash in to steal her away. Her emotions toward you may cool. There's no telling what could happen.
Once she's home with you, you'll be at her side the whole time too. You want her to get comfortable with you, after all. She can't get comfortable with you when you're not there.
Thus, this tactic might seem a smidge counterintuitive.
Yet if you want to solidify her commitment to you, and get her to value you more, this one'll do that.
And all you have to do to use it is (at the proper moment) leave her alone for two (2) minutes.