Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Paying Off Principal of Home vs. Investing In Mutual Fund
Other answers are already very good, but I'd like to add one step before taking the advice of the other answers... If you still can, switch to a 15 year mortgage, and figure out what percentage of your take-home pay the new payment is.  This is the position taken by Dave Ramsey*, and I believe this will give you a better base from which to launch your other goals for two reasons: Since you are then paying it off faster at a base payment, you may then want to take MrChrister's advice but put all extra income toward investments, feeling secure that your house will be paid off much sooner anyway (and at a lower interest rate). * Dave's advice isn't for everyone, because he takes a very long-term view.  However, in the long-term, it is great advice.  See  here for more. JoeTaxpayer is right, you will not see anything near guaranteed yearly rates in mutual funds, so make sure they are part of a long-term investing plan. You are not investing your time in learning the short-term stock game, so stay away from it.  As long as you are continuing to learn in your own career, you should see very good short-term gains there anyway.