How does a young woman prepare for her future husband and how will she know when he is "the one?"
She will prepare for him by growing deep roots in Jesus. Studying His Word consistently. Being involved in a good Bible believing church. Making godly girlfriends. Walking more and more in the Spirit by choosing to be kinder, gentler, controlling her emotions and moods, more joyful, more loving and friendly, more generous, etc. The more like Jesus you become, the better wife you will be when you meet "the one."
She will know he is "the one" when it is easy. You simply enjoy each other's company. You miss each other terribly when you are apart. You love being with him. You love him just the way that he is and you refuse to try and change anything about him. You want to support him in whatever he does in life. You want to make him happy for the rest of your life. You will fight for your marriage and not allow the enemy to tear it apart. You can't wait to say, "I do!"
Pray. Pray before you meet him. Pray after you meet him daily for God's direction. God said all we need to do is ask for wisdom and He will give it to you. Ask and you will receive. You want God to pick out your spouse. He does a really good job!
Then, when you marry "the one," live your life loving, serving, and pleasing him. Refuse to allow any negative thoughts ever to be planted in your mind. Love him for who he is today. Make his life heaven on earth.
But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, meekness, temperance: against such there is no law...If we live in the Spirit, let us also walk in the Spirit.