How can I have statistics emailed to me automatically?

On the main advertiser's properties screen you have the option to enable automatic campaign delivery report emails. You can specify how often the report should be sent.

You must specify who the report should be sent to.

First, on the main advertiser's properties you can define the main email of the advertiser, where reports and campaign expiration/activation emails will be sent.

Additionaly, in 2.6 you can go to the 'User Access' tab of an advertiser and assign users to the advertiser's account. Whoever is assigned to the advertiser will also have a report emailed to them. You can assign a user to as many different accounts as you need - so your admin or manager user can be assigned to any advertiser account it has access to.

Learn more about users and accounts in the
documentation.

You can also set on the advertiser properties for an email to be sent out when a campaign is expired.
You can further customize this in My Account->Account Preferences->Campaign Email Reports Preferences