Hi, scholarships fall into 3 major categories: merit based, community involvement/leadership based, financial needs based.
1) Merit based. The criteria is usually very clear for each scholarship. You can simply search for the GPA requirements that you qualify for.
2) Leadership. I suggest you only apply to scholarships that are meaningful to you and you are passionate about the principals behind the person/organization who established the scholarship. Your experience and passion have to connect to the scholarship committee, which the committee has to believe you will be a good representative of the scholarship.
3) Financial needs. This one is pretty self explanatory.