3. Relax. I've found that in classes where I get a 3.0 I usually understand the material and remember more of the class than I do in classes where I've gotten a 4.0. Little things count.
And as far as grade point averages go, your employers (unless you are applying for a very competitive and very specific job where GPAs might be the deciding factor) are not going to care if you have a 4.0. None of the jobs I have
ever applied for or held required my GPA for hiring purposes. When it came to education I was asked if I had a high school diploma/equivalent, if I earned a degree or if I am a student currently trying to earn a degree and when I will be graduating, and what my major is. My Dean's List award will certainly look good on my resume, but they just want to see if you have a degree and if your skill set fits the positions they need to fill. Getting an A+ in Western Civilization doesn't nearly mean as much as your proficiency with Word, or if you have prior work experience (which I know is an endless loop of I need experience to get a job but I don't have a job so I can't get experience), or if you are prompt and polite and a good team worker.
You don't even necessarily have to find a job in your major to work in. My dad majored in Theater, but he worked in education (first teaching theater, but then rising through the ranks of administration) and nobody gave him any grief about it. The degree is what people want to see, in his case, his Bachelor's and Master's.
And this doesn't mean you should just bomb all of your classes and barely scrape by. Take college seriously, but don't kill yourself over it. I care much more about earning A's in classes pertaining to my major than biology or other general ed classes that I will never have utilize after college.