First step to raising a strong daughter is to let them know they are loved and valued. A strong daughter will know that they are loved and valued by what you say and how to treat them. The relationship between a girl and her parents is a big part of what shapes her into a strong daughter.
Give your daughter reinforcement on her accomplishments. Let her know you care and think your daughter is special and wonderful. Make sure you pay attention to what she is doing so you can be there to acknowledge your strong daughter in her work. This can include showing off her projects and talking good about her to everyone. Let the whole world know about your strong daughter and her accomplishments.
Be willing to step back and let her go her own way when it is appropriate. Raising a strong daughter means letting her and be an individual when she needs to. But always be there when she needs help or stumbles. Letting her fall down to hard will not make her a strong daughter, it will just make her hurt.
The most important thing in raising a strong daughter is to let her see and know you. Hug her, kiss her, and let her enjoy her time with you as much as you enjoy your time with her. Let her know that you chose to spend time with her because she is important to you. This will help her to be a strong daughter who knows she has value.