"Hey John, I know you're quite busy, especially with the holiday period coming to an end, but I just wanted to get in touch with you to let you know we've got a special coming up for that 'How to win at poker' handbook you've always wanted."John's forgotten that he'd been looking to buy a book like this and this email reminds him that he needs to improve his game. John adds buying the handbook to his "To Do" list and goes about his daily business.