I've read the book (GTD) and I am getting ready to get started, but would like to better understand how to use the @computer, @home, @calls, @errands, etc. lists.

First question, are these lists next action lists?

Secondly, one forum outlined the following daily process:

Scan next action lists
Review calendar
Check tickler file

Am I to place specific time on my calendar to make calls, run errands? It if is not in my calendar then how am I to remember to do it?