For nonfiction, I like to skim the index, table of contents, and prefatory material first. I like to see the lingo the author expresses her/himself in, to get familiar with it and to spot their biases or world view a bit. I use the index also to take note of other people mentioned, or whose work is referenced, to see how the present material may plug into what I already know. I like to draw relationships of some sort between known and trusted information and sources, and the newer concepts the author is presenting to me.I skim this material before buying, usually, and then if the table of contents is not too fuzzy, cute, or patronizing, or offensive, or downright silly, I'll pick a spot in the middle and see if I can tolerate the writer's style... and if so, the subheads in the most interesting-looing chapter will get a look next. I want to know, for instance, if this writer is giving me some new ideas, or (better yet) going to conclusions past what I already know-- or if the book is just another superficial look at something I already know enough about. If the book passes all these skims, I'll take it and plunge into it deeply.
Once I have finished it (which includes discussing it with people of varying viewpoints, and reflecting on it as I do dishes or engage in other present-time musing), it seems to integrate itself into my general mind... once I get absorbed in some new material, I can seldom remember who wrote what, or when I read it, or where one thing left off and another began.... the information gets sorted into its constituent parts and stored away where I can USE it in operation.
If it was something I can recommend for someone else whose mind I respect, I will keep the book to pass on. I have developed a pretty extensive professional library in a nunber of subjects this way, and people coming for MudGathers might enjoy seeing this.
Fiction has to attract my attention as a writer and editor, before I care enough about plot or character to spend my time on it. So the first chapter matters, and if the first page or so looks boring I just don't take it home. And I tend to look for new work by authors I have enjoyed, till they start being formulaic and cranking out pattern books. But once into it, I will either read it straight through or add it to the carry-all to go with me for odd moments in the car, etc.
But then I also have been known to have four or five good books going at the same time, fiction and nonfiction, on a variety of topics, in different rooms or purses!
~Susan