Sage Research Project Planner
The Project Planner walks you through the entire process of doing a research project. Some of it will pertain to larger projects than the Capstone, but the sections on defining a topic and developing a researchable question will be helpful when you're figuring out what you want to study.
Introduction to Epidemiologic Research Methods in Public Health Practice by 
Using Statistics in the Social and Health Sciences with SPSS and Excel by 
