Create recognition programs and use them liberally. Recognition can be personal, departmental, or companywide. Still others recognize employees through internal newsletters, memos, bulletin boards, or emails. A very personal way to recognize completion is to send a short note or email to managers, notifying them of employees completing courses. Consider putting a copy of the note in the employees' personnel files.
Some companies reward attendees with popcorn, chocolate, ice cream, or other inexpensive treats.
Further, the online open house is a great time to register new users and hand out additional information. Promote e-learning as a way to find solutions to business issues and problems. Consider making some online courses available to the family members of employees. Conduct frequent course evaluations to pinpoint the strengths and weaknesses of your online learning initiative. Those can be formal evaluations or simple phone calls to random employees once they've completed a course.