Please consider donating stock shares you own to the USTC AF. You will enjoy extra tax savings (bigger if they appreciated significantly) if you are US tax payer.
The basic idea of the IRS rules is that, if you bought some stock shares (be it company options, ESPP purchases, etc.) at $10, and the shares are worth $100 each. You will be able to deduct the full $100 from your taxable income AND you don't have to pay capital gains tax since you never technically sold the stock.