Event Tips:

1) Ensure the speakers have everything they need
Some will need projectors, screens, power bars, overheads, chalkboards, whiteboards, etc. Make sure to check with them beforehand and then make sure everything actually made it to the location.

2) Food
If your event will cross meal times make sure to provide at least snacks for people to munch on. Fed people are happy people.

3) Have a schedule
Make sure people know when specific events will happen.

4) Choose a large enough venue
You want a place just big enough for the expected crowd. Too large and people will feel left out, too small and people may be left in the halls.

5) After the event
If the next event is already planned then make sure people know about it as they leave. Be sure to do a writeup for the website.