In order to help simplify answering the question "What should I observe tonight?", we have consolidated some of the places on the AAVSO website to look for information on urgently-needed observations. The three webpages:
have been consolidated into one new page: AAVSO Alert Notices for Observing Campaigns and Discoveries.
The announcement page summarizes this consolidation. I recommend you read that first, then go to the new page and explore there.
Many thanks, and Good observing!
Elizabeth Waagen, AAVSO HQ