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College—those were the days! Eighteen and graduating from high school, we thought we knew everything. You know what they say..."A lot of 18-year-olds are like old men. They think they've seen everything." And to an extent, it’s true.

Looking back, however, is there anything you would have done differently? Anything you wanted to do, but never did? Here’s what your brothers had to say:

Mark Lieberman ’69
In school: You probably spent 30-plus hours a week getting to or in class in high school and then more time studying. At Penn you have virtually no commute and 15 hours a week in class. Allocate the same amount of time you did in HS and you'll have as much time as you need or want for extracurricular activities.

Make sure to take at least one course each semester you really want—for me it was a class I took as a junior on 20th century American politics.

When you graduate (and beyond): Making money should be third most important in selecting a job after making sure it’s something you really want to do and something you're good at. Don't be afraid to be challenged!

Don't be afraid to change careers or professions. I began as a newspaper reporter, and then went into government, commercial banking, thrift banking and television.

Paul Puleo ’87
Classification: External Communication

Party more, study less and invest in Apple

What advice would you give your younger self? Click here to share your answers, or post them in the Facebook comment box below.