Talking of lists and things that aid you in preparing your book, as detailed in Part 1 and Part 2 of these guides, there are other things that are essential for the writer to do that will make his/her life easier in the long run.
Make a list of characters and in that list make sure you have notes on their significant features that are important to the plot or their relationships with others. For example, if one person has much longer hair than others, and this is relevant to the plot, make sure you know. Does someone have a tattoo, a distinguishing mark, a feature in the way they walk or talk, all of these things add to the story and you need to make sure you know them inside out.
Does someone wear the same pair of trousers, or have a distinguishing jacket or favourite pair of shoes etc, make sure you know and you are consistent in the use of this data.
How do these people relate to each other, either by family, or friendship, or the opposite? For example, person A and person B are enemies, but both have a good relationship with person C and so on.
Who is married to whom and/or going out with and so on.
Make sure that the shop he buys his paper in is next to the bus stop every time and it hasn’t suddenly found itself as a corner shop when it wasn’t earlier in the book.
Is there are significant geographical or historical link? Make a note of this.
If you are using real places and streets etc, make sure you have maps and know the names of the streets, find out the bus and train timetables so that you can work out how people can get from A to B and so on.
An obvious one, but it still needs a mention, the plot, what is the main plot line? and how do the subjects on the above lists interact and relate to each other. Make sure the sub-plots are tangible and fit with how you want the story to be told.
Above all, be consistent.
Keep writing, for you know you have to