<prompt> Human: 8 months ago when I bought the house I was a typical hands-off personal finance person I had no idea or plan of what I was doing. Ive since become aware of the error of my ways and am trying to make the neccesary changes. I have no consumer debt and my spending is disciplined. I am saving 50 or more of my takehome and can afford the extra mortgage payments. Should I refi to a 15yr or start saving money in an interest bearing account with the intention of eventually paying off the mortgage in one felled swoop? Side note, I am maxing my 401K.  <response>: A 30 year rate from 8 months ago is probably about the same as a 15 year rate today.Just pay extra towards principal every month if you want it paid off in 15. 