I might as well chime in, too, Twigg. On the plus side for your classes, you don't have any labs. So, you don't have to worry about working those into your schedule, though I don't get how or why you are taking chem w/o lab. Do you not have to take lab, or are you thinking of fitting that in at a later time?
How many hours did you take last semester? How did you do, not just gradewise, but time and comfort wise?
I signed up for 20 hrs last semester & expected to wind up dropping something. There was only one that I expected to be easy - a programming class. Two of my science classes had labs. One was a foreign language, and one was math. The semester was not at all the killer that I had expected it to be. It did take dedication and work, but there was still plenty of time for me to spend two afternoons/wk working in the lab, time to do my volunteering and time to socialize & post on here. It was quite survivable, but not something I would look forward to doing every semester.
The big thing that jumps out at me is that you are planning to take that neurobio course now. If the course is any good, you are going to want to take at least ochem and molecular bio first. I say that, not just because it makes the course easier, but because you are really interested in the subject. The more prepared you are when you go in, the better you will retain the information. That is a subject I would recommend putting off for awhile.
Psychology & neuroscience might not have many overlapping required classes, but the material will overlap. The psych course is also a good one to take before the neuro courses. Like others have said, double majors don't mean anything to anyone else. You can always take courses that interest you but are outside of your major. It takes much of the pressure off.
Take the karate! That should be one of the last things you think about giving up. The exercise will be good for you, and it will give you something to look forward to throughout the week.
You want to find balance in your studies and nonacademic pursuits during the semester. It's much easier to actually learn the material when you aren't overtaxed. I really do suggest taking the neuro course later, and if you need a chem lab, taking that and waiting on the Arabic as well.
