The best way to get scholarships and other opportunities is to have the ambition to apply for them. There's a funny thing that happens where once you start adding scholarships and other positions to your resume, the people reviewing your application will say "Hey, XYZ thinks that this person is deserving, so we should too!". Start out with smaller things and work your way up.
Ultimately, this isn't a silver bullet that will get you any scholarship–it only works if you combine it with hard work in school–but having the ambition to go apply for things like scholarships (jobs are the same way!) will greatly help you differentiate yourself from other applicants.