Applied at Target for Unknown

I'm feeling really discouraged in my job search. I graduated high school recently and was hoping to find a summer job to save up for college starting in August. I started applying in late May, but I've had no luck so far. I applied to Target and got rejected, Domino's hasn't responded, and Family Fare Market informed me that they aren't considering my application anymore. I really need some serious advice on how to land a summer or seasonal job. Any tips would be greatly appreciated!