Even though I haven't technically gotten an acceptance letter yet, I can tell you what one of my CSD professors told me when I was first considering SLP 3 years ago. I was a Psychology major in undergrad, so to get more involved in and prepared for a career in CSD, I joined my school's undergraduate NSSLHA chapter, volunteered in the SLP unit of the hospital, and did the 25 observation hours required by ASHA. Some schools require you to have the 25 hours finished before you even apply, some don't. But in order to get the CCC-SLP, 25 of your 400 clock hours have to be observation anyway, so why not show admissions that you took the initiative to do yours early? It shows them that you've made yourself familiar with the field and that you're certain this is really what you want to be doing. If your school offers any of the prerequisites to the masters programs, definitely take those as well. You may be able to take them through other schools too. But again, taking the courses shows them that you know what to expect in the program/field and you've started to prepare for it. Different programs have different prerequisite requirements, but definitely cover those on the ASHA website that are required like a physical science, a biological science, etc. The non-CSD courses I took that weren't in my major but provided my transcript with more "enrichment" were things like Linguistics 101 and another Linguistics course called Language Acquisition and Development. As a psych major, take the course in developmental psych if you haven't already- different schools have different names for this course, but I think you know what I'm talk about. Your advisor might be able to offer more ideas for courses to take to give you an academic background that's in accordance with CSD. If you can't tell, my advice is mostly for someone planning to work on the clinical side and specifically with younger populations. If you're interested in the research side, you might not need some of my advice, but I would say the NSSLHA, Prereq courses, and 25 observation hours are still important regardless of the graduate degree track you choose!