In the JAN 2009 T&D magazine, Mark Simon writes of seven disastrous decisions that contribute to e-learning failure. In the article he addresses marketing; assessments; work environment; learner course interface; LMS and end user sets. I would add this one: Failing to design your course to be evergreen.
I've found that many courses that were focused on a specific initiative tended to live on and on. Here's the course introducing some product/tool with a supposed limited shelf life and now it's used in new hire training. Therefore go ahead and design it to be evergreen. Take into account accessibility issues on the front end. Add those image ALT TEXT and design for colorblind learners per 508.
Build once, use many times.