Smile. Women are smile-addicts . A few well-placed smiles, a happy attitude, some (non-erotic!) jokes here and there and you can win a woman's heart faster than a handsome tall guy, who is grumpy.
One reason why women react so positively to smiling and humor is probably that it shows that the man is not dangerous . It could very well be that many women want strong men, but, at the same time, are afraid of them. Smiling and being friendly compensates this fear.
Use a deep voice. If your voice cracks sometimes (= uses high tones) then you need to train to keep it low. A high tone or cracking voice sounds immature and adolescent.