The Snyder, Glajch, & Kirkland book is the standard text on method development. It does have examples, but is probably still mainly theory-oriented. If you want real-life examples, go to the LC-GC website (there's a link in the sponsor area on the upper right) and read through back issues of John Dolan's LC Troubleshooting column. One of the nice things about John's column (aside from the readable style) is that he spends time dealing with things he tried that didn't work. [by way of "full disclosure", I've worked with John for the past 20 years]
And the LCGC Magazine is free! I like it. I like it.
I'll definitely check out Mr. Dolan's column.