I talk about a player's favorite class.

I talk about keeping track of time in a game.

I talk about the "open table" and the thing to be aware of when implementing them.

I talk about how GMs can throw out something unusual every so often to keep the PCs guessing.

I talk about how a GM should use tables in their game IMO.

I talk about how GMs can get a little info about the PCs right off the bat.

I talk about Rumor Tables in old-school modules an how GMs should make their own.

I talk about customizing your list of monsters.

I talk about immersing the PCs into the campaign world that has a certain feel.

I talk about how PCs should become familiar with their home town.