You attract into your life whatever it is you focus on. Whatever you give your energy and attention to will come back to you. Focus on the good and postive, and that's what you will manifest in your life. Focus on the negative, and that's what will manifest in your life.
Science or Woo? I suppose that depends upon what you believe
Give your energy and focus to postive thoughts. Your thoughts send out vibrations into the Universe. This vibration starts a wave. Everything in the Universe that is harmonic to this vibration will start to come to you. Be intentional in what you think. Decide what you want and then focus on how you are going to feel, who you will be spending your time with, what you will be doing, and how you will spend your day when you have what you want. When you find yourself sinking into negative thinking, try this: replace that negative thought/voice in your head with a positive thought. Every. Single. Time. Or that negative thought becomes a vortex and repeats itself.
Believe you'll get what you want. And then take action.
Go after what you want. Maintain a positive expectancy.
Focus on love, joy, and gratitude throughout the day. Practice feeling the emotions that you are going to feel when you have what you want. Start acting "as if" ... as if you already have what you want.