I really like the fact that this post first distinguishes "#1 Bookings vs. Revenue".

I hear it almost everyday among startups, where they talk about bookings, revenue and incoming payments interchangeably. And sometimes even in the same sentence such as "We made 100 k in the whole last year [meaning revenue], we currently make about 50 k per month [meaning bookings] and just last week we made another 30 k [meaning incoming payment]."

This makes it way to hard to properly communicate with founders. So great stuff this post.