How to learn Biblical Hebrew

I've been thinking a lot about learning Hebrew as an adult, because it turns out lots of people in my circle are attempting this, in addition to the people who are actually in my classes. I thought I might write down some guidelines here, with the faint intention of one day turning this into a textbook, or at least a guide I can refer to when more people ask me similar questions.

( my opinions, let me show you them )

If you are or have been in this position of an adult Hebrew learner, what else do you need to know?