I need a job in san marcos california!?

I've literally tried almost everything and am so !@#$ing fed up with not being able to find one no matter how hard I try. I'm 19, male, have my own car, and am looking for a part time job from friday to sunday as I'm also a full time student. As embarrassing as it is to say, I'm desperate and would appreciate help or advice of any kind. Thanks for listening fellow yahoo users. :/