Keep in mind, you can shorten the term of any loan just by making extra principal payments as much and as often as you want. (loanshoppers.net)
As an alternative to a mortgage refinance, you could also make extra principal payments on your loan to pay off a mortgage earlier and save on interest. (personalfinanceinsider.com)
By paying extra principal instead of investing it in Internet stocks like my colleagues. (biggerpockets.com)