There is that specific reason why you want to hold an event. You should make this reason the focus when making plans. For example, if the event aims to attract more investors to your business, you should ensure that the event revolves around informing the investors about your USP and brand.
Managing attendees by being as accommodating as possible since numbers can change
Managing the technology of your event from maybe mobile event app to audiovisual
When it comes to planning a fun event there are others out there that can help with it.
It is important to speak to the people you are working with closely and get their views concerning the plans and areas that need to be changed.