January is a great time to cultivate all the donors who gave to your organization in 2017. And one way to cultivate those who gave last year is by sending a thank you letter that shares the many accomplishments their 2017 gifts made possible. As an added benefit for your donors, this letter should also include a summary of all 2017 gifts that can be used for tax purposes.   Listen to this week’s bonus break to learn more about this best practice.