You are young, and have not met the big disasters of life yet, like a divorce with children, the death of a loved one, the bad decisions with life-long consequences. At your age I liked keeping track and archives, even bank statements many years back. Not a good idea. Your past starts to grow on you, and can slow you down on your way to new pastures. So remember to build in mechanisms for forgetting all but the most essential stuff. Use Facebook and Linkedin to keep track of people, keep some nice pictures, but learn to delete and forget. You will thank me later.