Mental block, absolutely! Well, if you have mental illness/disability-related issues you can get extra help through the disabilities and counseling offices - which is something you may want to look into in making your choice for ones with good programs in this area. Getting this stuff arranged going in can help you start off right. Personally, I see my T through the counseling office - it's free and he's well-experienced. I hear not all colleges offer it free though, so you should check that. And I work with the DSS(disabilities) office to get a little help with stuff like getting behind because the depression/whatever else is too bad. You can also make full use of tutoring and labs(writing, math, language, whatever). And if you're considering both public and private schools, you may want to lean towards the public ones. They tend to be more understanding, generally, than private ones if you do have trouble with mental health while there.

Non-mental health things to consider: I'm guessing you're wanting to start off living on campus at a college and going straight into a chosen study plan? I know that feeling, but I still highly recommend considering a community college to start off with gen-eds and do a little exploring on your interests. It's much cheaper, and you may find once you've started into college your interests change. I switched my major a lot, and there's many other students who do so too, even those who don't think they will. It's kinda like the world opens up a bit more to you once out of high school and you see different opportunities. But if you don't choose a community college, at least look into a first semester course that broadens your perspective a little. I don't know what other schools might call them, at my university we have a course called LIB 100, which is liberal studies/interdisciplinary studies, and I'm pretty sure every student who takes it is glad they did. It's part philosophy - which is also very good to take - and the rest is a look at the disciplines and how they relate... my explanation isn't doing it justice.

Also consider how well their courses would transfer if needed, and whether they have enough variety of programs near your areas of interest that you could switch majors within the school if you wanted to. And you may want to start out looking for a liberal/multidiscipinary studies program if you have some variety of interests or aren't totally sure what you want to do - these programs can blend together areas of studies into a degree that is both pretty specific to your future plans but also trains you to be flexible and knowledgeable in other areas too - integrative, very useful. (Ok, so this is my degree, and I guess I'm promoting it... but it is a pretty cool thing.)

Another thing that could help you narrow it down is if they have levels beyond the BA/BS available in your study area - even if you don't think you're interested now, you might find you are later, and already being in that school can give you good connections in applying into further programs. Consider too the quality of their career services - mine has a great office full of resources and connections to employers, but some just don't. Internship opportunites, study abroad opportunities (which is a very good idea no matter what your field because it expands your view of the world and looks great in your resume besides).

Campus tours are good. Look at recreational and campus life programs. Look at location, and available transportation.

Make sure you develop good study habits. Do everything you can to get in with a good group of students. Resist urges to party and avoid students who do - it just isn't a good idea, and all you'd really miss is group stupidity and hangovers. Use study groups. Watch campus events for interesting things.

Oh, and avoid going through the bookstore for books whenever possible! You can buy through half.com, through lists posted by students around school, and there might be other things like here we have a bookstore that sells textbooks for most of the colleges around here (multi-college town) cheaper than college bookstores, and there was a student-run exchange website, too.