The most efficient way to track a single contact across multiple accounts, such as an executive associated with both a business and a nonprofit, is by enabling the Contact to Multiple Accounts feature. This functionality allows a contact to have a primary relationship with one account while also maintaining indirect relationships with other accounts. For example, the contact could be directly related to their primary business account while also being connected to a nonprofit account as an indirect relationship. This avoids the need for duplicate records and ensures that interactions across all related accounts are tracked within a single contact record