If you constantly look for things to be excited about, excitement will follow you everywhere. Looking for exciting ideas, things, places, people and events keeps your vibration (i.e., emotion) high while allowing you to let go of your old desires so they can manifest.
If you only focus on ONE thing you're excited about (but that you're not 100% sure it will happen), then you keep the vibration of it not yet existing alive. When your vibration is about lacking something, the universe will keep bringing you more feelings of lack.
That's why being tied to a certain physical manifestation can be disappointing. If you focus on the physical manifestation of what you want, rather than the feeling you desire, then you are perpetuating a feeling of want, and the universe will let you keep wanting.
If you are able to constantly move on to new desires, finding more and more ideas to get excited about (each and every moment!), then the old desires you have let go (therefore deactivating the feeling of lack) will have no choice but to manifest in your physical experience!
Recently I've been making a list of 11 things I'm excited about every day. When an idea comes to me that makes me feel really excited, I add it to the list. This helps me to remember to actively focus on looking for excitement throughout the day.
Thanks to VJ Decay for the mad AJ skills!