Look for organizations that you have an affiliation with, as an example, if you're a member of an organization and they're offering a scholarship just being part of this group has already given you great exposure. If your family has an affiliation, that helps as well.
Also pay close attention to Scholarships that ask for an essay on how you will use the money. I've served on committees who review applications and the essay plays a key role in showing how this award will impact the applicants future, what they plan on doing with their education and who they will impact in the community once they've graduated.
When giving away funds to students, organizations want to be assured that these funds are going to individuals that will continue to strive for better, not only for themselves but those they serve. Best of luck!