Chapter 2.6 of this ebook, entitled "Developing a personal teaching philosophy," includes guidelines and questions to ask yourself to help develop a teaching philosophy, particularly in section 2.6.1. While the book is geared specifically toward teaching librarians, it has very good advice that is applicable to all teachers. Readers may choose to skip those parts that discuss information literacy (a librarian's specialty) but should keep in mind their own discipline (math, science, language, etc.) when developing their philosophy.
The following resources are referenced in Chapter 2.6 of McGuinness' book.
This site, created by John B. Collins and Daniel D. Pratt, is designed to help teachers collect their thoughts and summarize their ideas about teaching.
This site from the University of Minnesota's Center for Educational Innovation offers practical information including: getting started, creating a draft, assessing your draft, and rubics and samples.
Websites with Examples
The following websites include examples of teaching philosophies.
The Academic Teaching Librarian's Handbook by