Obviously your options are quite limited with less than a month left in the year. In general, you would want to reduce your taxable income in a year that has an unusually large amount of short term gains. If you have any investments with unrealized losses, you should sell and realize the loss before the end of the year. If you are still working and expect a year end bonus, you should inquire as to whether your company is willing to defer the bonus until January. Consider taking some of the charitable contributions that you are planning on making next year and making them this year instead. The charity gets the same amount of money, but if you itemize you'll get the deduction when it does you the most good. Pay your property tax bill before the end of December to make sure you get that deduction. Pay January's mortgage payment before the end of the year in order to bump up your mortgage interest deduction. If you are eligible to contribute to a tax deductible IRA, max out your contributions.