I second what Chandru1 says. One hundred percent.
Do things that you are passionate about, and that will be reflected in your resume/statement of purpose/interviews. I spent some time teaching abroad and taught horseback riding lessons as my job while I was in undergrad not because they're 100% related to SLP - simply because that's what I loved to do. Both of those activities became compelling stories to tell in interviews, and I was an interesting and well-rounded applicant because of it.
Some of the best advice I got from an admitted student was to only think one step ahead, and not to stress about what you can't control yet. Think about opportunities you can take this year and next year, start casually perusing school sites in a year or so to get a flavor for what the process is like. But more than anything keep your grades up, learn/do new things that interest you, and enjoy the ride!