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That was a great list! I'm going to use it for our own list for trade-shows as a lot are very helpful.
One area I think that is missing is the pre-event marketing for tradeshows. Promoting the event, advertising to attendees in advance, building leads in advance, and setting appointments for face to face meetings at the event is a must! I've always found it strange that marketing executives who spend so much on event marketing don't spend the time to do promotion before the event, targeting attendees only, like our program does: http://jsainteractive.com/conference-lead-generation . Having a good set of warm qualified leads and appointments for the conference can really change the level of success and double the face to face meetings.
It may be slightly different for online events...
10 months, 1 week ago on How to Market an Event: 50 Event Marketing Tips