First, search/surf through "OTHER FACULTY" links, especially in your own discipline. Note the range of enhancements being used. Think about the kinds of enhancements that make sense for you.
TUFTS UNIVERSITY FACULTY PAGES
MATH PROFESSOR AT SALEM STATE
BLACKBOARD COURSE INFO PUBLIC CATALOG
Similarly, surf through the publishers' resources for particular texts and in general, again paying particular attention to those in your discipline.
Allyn & Bacon's WEB GALLERY
Prentice-Hall's ONLINE GALLERY
Allyn & Bacon's Technology Solutions