Even if a job didn't go perfectly, when employees make an extra effort or work under adverse conditions, they deserve praise for a job well done. If appropriate, give the employee's efforts additional exposure by sending a copy to his boss or yours.
1234, Main Street
Boston, MA 02123
<Recipient Address Goes Here>
I just wanted to let you know how much I appreciate <employee action>. <Further description>.
We're certainly lucky to have someone with your talent and dedication as part of our organization. Congratulations on an excellent performance and thank you.
encl: <List of enclosed items goes here>