Appendices should be devoted to those aspects of your project that are of secondary interest to the reader. Begin by assuming that the reader will only have a short time to read your proposal and it will only be the main body of your proposal (not the Appendices). Then, assume that you have gotten the attention of the reader who would now like some additional information. This is the purpose of the Appendices.
Here are some possible sections to include in the Appendices:
Dissemination Plan - An important aspect of your proposal will be the plan for disseminating information of/from the project to other audiences. Most funding agencies are interested in seeing how their financial support of your project will extend to other audiences. This may include newsletters, workshops, radio broadcasts, presentations, printed handouts, slide shows, training programs, etc. If you have an advisory group involved with your project they can be very helpful in disseminating project information to other audiences.
Time Line - A clear indication of the time frame for the project and the times when each aspect of the project will be implemented. Try creating the time line as a graphic representation (not too many words). If done well, it will help demonstrate the feasibility of the project in a very visible way.
Letters of Support - Funding agencies would like to know that others feel strongly enough about your project that they are willing to write a letter in support of the project. Talk through with the potential letter writers the sort of focus that you think will be important for their letter. (Try and draw on the reputation of the letter writing group.) Do not get pushed into writing the letters for the agencies - they will all sound alike and will probably defeat your purpose of using them. The letters must be substantive. If not, do not use them! Have the letters addressed directly to the funding agency. (Do not use a general "To Whom It May Concern" letter - it makes it appear that you are applying to many different potential funding agencies and are using the same letter for each. This may really be the case, so make sure you personalize each letter to the specific potential funding agency.)
Cooperating Agency Descriptions - If you have referenced in your proposal different cooperating agencies that you will be working with, it is a good idea to provide a more detailed description of each of these agencies in the Appendices. Rather than include large descriptions of each cooperating agency, a single page that gives the name/address of the agency, names of key personnel, and brief descriptions of the major services provided is sufficient. Try and prepare each of these single page descriptions so they follow a similar outline/presentation of information.
Evaluation Instrument - Include a draft copy of the actual evaluation instrument you plan to use (survey, questionnaire, interview guide, etc.). This will let your prospective funding agency know that you are serious about making evaluation an integral part of your project - and funding agencies like to hear this! Indicate DRAFT at the top of the instrument and then make it look as real as possible. Never say things like, "I think I may have a question that deals with...", or "Four or five questions will be included that examine the concern of...". If you will be using an interview procedure or a focus group discussion, include a draft copy of the specific questions that will actually be used for the interview/discussion.