First thing, relax. It is only the first week. You'll get used to it.
Next, sit down and make a schedule. Plan on at least 30 hours a week of studying. Yes, it's a lot, but if you treat school like a job you'll do well.
Then figure out when you do work the best. I am best at doing work before 10 am and after 8 pm (which is why I am on Yahoo Answers and not writing my paper now). What I do is get to the library at 8 am and study until 10:30/11. Then I go to lunch, classes, work out, nap, watch trash TV, and play with my friends. It is useless for me to try to do work. It just won't happen. After dinner I make myself a cup of coffee and lock myself in the library until 1 am. I get 9 hours of studying done a day at the times which work for me.
Also, take notes when you read. It takes longer, but you'll remember more of it. Focus on vocab and key ideas. These will be a life savor as a cheat-sheet in class and to study for tests. After you are done reading the chapter, go back and reread your notes to make sure you get it.
You normally need to read everything. It may not seem like it, but you never know when a teacher will throw it to you on a test or a quiz. Once you have had the prof before you'll know when you can skip a reading.
If you still have trouble, your normall, and you need to ask for help. Study with a classmate (notice I didn't say friend? It is almost impossible to get work done with friends), ask your professors for help (they don't bite, I promise), or see if you can get a tutor.
English-- should be mostly about writing papers. If you can write well, most of the reading will be how well you understand and can explain it.
Psychology-- there is some science in the beginning, but most of it is common sense and easy. Straight memorization. Make flashcards to understand the key concepts.
Sociology-- common sense with a vocabulary. Use flashcards to master the vocab and you'll be fine.
Algebra-- pretty simple once you get working with letters. If you get lost, get help ASAP because it is hard to catch up.
Poli Sci-- read the main stories of the NY Times (www.nytimes.com) everyday. Major suck up points. Also do all of the reading because profs will throw it back at you all semester.
Good Luck!