I save all my announcements and other static posts and re-use them for future classes.
For grading, I use a combination of Word and Excel, prepared for each class and re-used.
Textexpander, or another clipboard program is also a fantastic resource for frequently used text.
The information management skills I have developed as an online instructor include using certain standard announcements, discussion posts and emails when setting up or starting a new course.
Since I often teach the same fundamental classes over and over, I have developed certain introductory/orientation announcements to provide valuable information to new students who are often confused and overwhelmed. I also use certain introductory emails to greet and welcome, as well as provide information and expectations for the course. In the discussion board, I post the first discussion setting the tone for the week and I reuse those posts, emails and announcements so I don't have to retype each time and to make sure I'm always using the same information, not changing it or omitting anything.
