Suggested by consultant Thea Skaff:
We saw a 25% increase in Remind Me Later email signups by adding an autofocus on the email submission field when a user selects the Remind Me Later option on our fundraising banners.
One other place it'd make sense to autofocus: after a reader has chosen an amount and the credit card payment method from a fundraising banner, they are redirected to payments.wiki to complete the other required fields. Could we autofocus on the top left field (currently First Name) after that redirect?