Marc BenioffSalesforce CEO Marc BenioffSalesforce

Dreamforce is Salesforce’s massive tech conference — so massive, in fact, that practically shuts down the city of San Francisco for the better part of a week. And it’s coming soon, running from September 25th to the 28th.

The streets of San Francisco will be packed with the 170,000 attendees eager to learn about tech and enjoy an onslaught of music concerts, parties and other events.

To do this event right takes a bit of planning, preparation, and maybe even a bit of shopping.

With over 2,700 sessions, speakers like former Vice President Al Gore, a concert featuring Metallica, and countless unofficial meetings to be had in the streets and hallways, it’s a busy time and a doozy to plan for. You may have your tickets booked and a calender filled out, but are you really ready for Dreamforce?

Maybe not. But have no fear. We’ve compiled the five things you need to know before showing up to Dreamforce this year. Don’t say we didn’t warn you.

An earlier version of this story first ran in November 2017.