Not content with the world? Now is the time to donate money to organizations that help effect the kind of change you want to see. Don't like that people go hungry? Donate to one of the many groups that feed people. Don't like that America routinely violates people's basic human rights? Donate to ACLU, EFF, and/or Amnesty International.
For those of you who pay income tax in the US, consider the value of a tax-deductible donation. If you have enough deductions, you essentially get a big fat rebate on each one (equal to the federal income tax you paid when earning that money). State income tax and interest on mortgage payments are deductible, so if you spend a lot on those, the US government will subsidize your philanthropy.