@highlighter- Getting the required letters of recommendation to get into grad school can be one of the most daunting tasks of your undergraduate career. I am in the process of preparing my profile for graduate school and I am working on my recommendations.
My advice to you is to work on building relationships with your professors. If you can get three good recommendations from respected professors then you are more likely to get an acceptance letter. I spend a lot of time talking to professors outside of class, attending events that they might organize, and working my hardest in their classes.
For example, one of my professors in my department helped organize a human rights film festival. The festival was interesting, and the following panel discussions were worthwhile, but as much as I was there for the show, I was there to make my presence known to my professor. All I can say is work on building relationships so you can get meaningful recommendations.