Google Drive is Google's file sync app that lets you store all of your files online alongside your Google Docs documents, and keep them synced with all of your devices.
Add video links to planning meetings already on the calendar.
Your guests get the video link and available dial-in details on the invitation they already have, even when you create the room later.
Hand off registration entries after signup closes with repeats flagged.
Get a downloadable CSV after your form closes, with the entry count in its name and missing answers and possible repeats flagged for review.