Talk to your school counselors. There's probably a career counselor or college counselor in your Department of Psychology or similar; they'll have great recommendations for things that you can do to get ahead in your career.
Here's an article:
I can't recommend enough that you start a club in college (whether it's related to psych, therapy, or even just a hobby of yours). I made a sort of lecturing club where people could present their non-academic passions and practice public speaking, got about 6 semi-active participants, and it was a great talking point on my resume for interviews. It shows initiative and interpersonal skills, both of which are invaluable in any field. Joining a club and trying to participate in its management is an equally worthwhile experience.
Toastmasters is a good, national (global?) organization that's all about public speaking; it has name recognition and an emphasis on interpersonal skills that would likely be relevant to any Psych sorts of thing that you want to pursue.