Not because it's the holidays or because you get a tax deduction.
Not because someone is going to match your funds or because your neighbor won't be able to enter a marathon if you don't.
Not because the kid is at the doorbell with those cookies or because it's pledge week.
And not because you read something that pulled your heartstrings.
Right now, for no good reason (and for every good reason), even if it's only $5. Pick whatever cause you care about. And tell a friend.
What if everyone did that, right now?
Generosity is its own reward. Go for it.