Ike Ellis has a quick tip for managing multiple Power BI accounts across different clients:
As a consultant, I find it difficult to switch between accounts on PowerBI.com.
I have to log out of an existing account and log back in to a new account. The login process takes a long time. I have found a work around. I use google chrome to manage different chrome accounts, different themes, different cookies, and this allows me to stay logged in to multiple power bi accounts at the same time.
Great tip.