Thank you for this post! One thing:

1. Look into matching donations - If you’re gonna give money to charity anyway, you should see if you can get your employer to match your gift. Thousands of employers will match donations to qualified non-profits. When you get free money -- you should take it.

If GiveWell's cost-benefit calculations are remotely right, you should downplay matching donations even more than just making this item second-last. I fear that matching donations are so easy to think about that they will distract people from picking good charities.