Capitalized interest on student loans
If you're currently in college and have student loans you haven't started paying on, you really should google the term "capitalized interest." Understand what the concept is and figure out if you could maybe pay even $10 a month (anything really) against that capitalized interest that's building while your loan is deferred.
Two of my loans just went out of deferred status. The capitalized interest charges added to the principal were nearly $1000.
Think of it like those "no interest, no payments for (some time period)" offers at big box stores. With student loans, it's just "no payments." Interest is accruing that whole time you're in school. Consider contacting your lender and ask how you might make payments to offset that!