Work out a patterned presentation and stick to your pattern. Consistent formatting throughout makes your resume easier to understand. Dates should be included, usually over on the right in an unobtrusive place. You don't need to be fanatically accurate, e.g., May 12 to August 20, 1990. People tend to get suspicious if you omit dates, so do so only if you have good reason.
People tend to skim resumes from top to bottom like a table of contents.
High school information can be left out once you're in college unless including it will make a good impression. Don't let a printer or copy center choose the paper for you - pick it out yourself. Don't pick paper that is too expensive. Prepare a well-typed copy or, if possible, use a computer and get it laser printed. Take your copy, clearly typed or printed on flat white paper to a copy center.