undergrad97

I'm an undergraduate about to finish his second year of college, and I've been thinking a lot about graduate schools. I'm interested in pursuing a PhD in sociology. My question is: what do you wish you could have gone back and told your undergraduate self? This can concern courses, faculty connections, graduate application process, research, etc. Any and all advice is hugely appreciated. Some background on myself: Political Science major who recently decided to double major in Sociology after realizing that polisci felt too narrow. Also pursuing a minor in cognitive science, as I've been somewhat fascinated by cognitive sociology. I go to UC San Diego, and balance a research assistantship in the political science program with a job. I've also dabbled in journalism on campus. I've been looking to get more involved, perhaps further in social research. I am especially interested in advice on acquiring research experience in the social sciences/good skills to develop.