Chances are we have all run across one detail or another that we weren't that sure of, and tried to wing it or somehow worked around it. But this doesn't always work, especially in the case of woodworking. the best course of action when you don't know is to find the answer.
Consult a professional or look up the correct way to do a job to ensure your success. There are many reference materials available at the library or on the Internet. Buy a book or try some of the great woodworking software that's available for your computer. Lastly, find what woodworking classes are available in your area and take one. Brushing up on your skill as a woodworker will only benefit you and the end result of your projects.