To raise (increase) your vibration simply means to give your desire more positive attention, energy and focus.
The Law of Attraction brings you more of whatever you give your attention, energy and focus to. If, however, you identify your desire and you don't give it attention, energy and focus, then there is no manifestation. As you're giving it attention, you are now including the vibration of your desire in your current vibration. Your current vibration is what the Law of Attraction responds to.
Some people are good at identifying their desires and then they tuck their list of desires away and never give it attention again. The Law of Attraction can only respond to what you're giving your attention to.
Create your list of what you desire and give it attention everyday.