What's the breakdown of your net worth?
I say this because you could probably retire tomorrow, if your annual spending is mustachian enough. Let's assume 600k investments and 300k home equity.
If you use the 4% withdrawal rate you could spend $24,000 annually. If you have your house paid off, and don't spend frivolously, then you could easily live off your money TODAY.
Please read about the Roth pipeline. Also, what you could do is load up your 401k and Roth IRA for 2015, then retire when you hit all your limits.
Congratulations on the net worth. Open your mind to the possibility of not having to work any more. Or, switch careers to something you actually want to do!