Paying off financing early
It can save interest. Check the terms first for a fee that takes some of the saving back.
Interest usually builds on the balance that's left, so clearing it sooner tends to mean paying less of it. Even an occasional extra payment can shorten the term.
Before you do, look in the agreement for a prepayment fee, and ask the lender how it applies extra payments. You want the money to come off the balance rather than count toward next month. Keep enough aside for the bills that arrive regardless.