As Rena Paloff and Keith Pratt point out, when designing a course, the course learning goals are the primary focus, rather than merely adding neat technologies for their own sake. Especially when you're just beginning to teach online, simpler, more common technology might be better than the most sophisticated gizmos. As with face-to-face courses, you can incrementally introduce and experiment with new methods each semester. And consider whether you need to deliver a lot of content to students, or your course is more of a process involving student composition and professor mentorship.
When you do select technologies, another important consideration is what students already regularly use, or what they might commonly use after graduation. Despite it's popularity, (as we've said) social media may or may not be appropriate. But what kinds of applications are common in professions related to your field of study?
For example, cloud storage is increasingly used in government, business, and educational institutions, so Google Drive and related apps are relevant to your students outside of their schoolwork. Social science and marketing often use survey toolsets like Qualtrics. Youtube is an enormous resource for entertainment, education, and professional development. Reinforcing technical and soft skills (sharing files via cloud storage, beginning an email with "Professor Smith," instead of "Hey," or editing video productions for clarity, and so forth) of these common tools can be an added benefit of your course.
While we've explored various resources potentially useful for many academic disciplines, chances are there's a body of literature focused on web-based learning in your specific field of study. And as stated last week, if you search the web for courses and syllabi, you'll likely see how others in your field are teaching online.
For example, historians can read T. Mills Kelly's Teaching History in the Digital Age, a recent work on how undergraduate history education can profit from web-based teaching. Kelly is part of the Roy Rosenzweig Center for History and New Media, at George Mason University, which offers a large collection of resources for online liberal arts and history education.
Other fields have similar web presence. Searching the web, and discussing online education with colleagues at conferences can reveal tips for how your discipline uses the web to its pedagogical advantage.
At academic conferences, whether part of the formal program or just the topic of conversation at lunch, you can often learn a lot about teaching online or hybrid courses from those in your field or related disciplines.
You need not (and certainly will not) like or adopt every tip, tool, or technique suggested by a fellow professor. But generally colleagues are an excellent source for support.