S.W.
My husband has gone through this once already, as his first daughter (my SD) is 26, and we survived! Our daughter is now 9.
Dads can be very influential in how girls see themselves as young women, and how they learn to be with boys/young men. I know some dads who take their daughters out on regular "dates". He dresses nice, picks her up, takes her to dinner and something after. He treats her how he wants the boys she eventually dates to treat her, opening doors, complimenting her, etc. They say "I'm going to spoil her so any boy will have to treat her right." I love that idea.
Dads who compliment their daughters regularly can help build self-esteem and reassure them that they are attractive so they don't have to go looking for attention in the wrong places. Dads need to keep being physically close with their daughters, don't stop hugging them or touching them because they hit puberty. All people need physical touch, and girls that don't get that sometimes go looking for it elsewhere.
And Dads can help their daughters be physically confident, through any type of sport or physical activity (our daughter trains in karate along with me).
We can prepare girls to be self-assured and confident, so they can handle themselves through the growing up times. I talk with my 9 year-old about all things, how she doesn't have to like the first guy who likes her, how she can be "picky", how she deserves to be treated, etc. My mom did not do this, and my dad was so uncomfortable with puberty that he withdrew. Will not do that!