I talk about PCs' areas of specialty.

I talk about how to keep track of your evil organizations.

I talk about backstories and what they mean to a PC.

I talk about how to get newbies going.

I talk about using recording devices in your sessions.

I talk about how GMs scatter bits and bobs of plot "breadcrumbs."

I talk about how to deal with NPC encounters.

I talk about the table (if any) gamers play on.

I talk about PCs that have a backstory that you can do NOTHING with.

I talk about writing adventures from the beginning and end to the middle.