There are a number of books out there which talk about celestial and natural navigation, such as: The Natural Navigator: A Watchful Explorer's Guide to a Nearly Forgotten Skill by Tristan Gooley and Finding Your Way Without Map or Compass Harold Gatty (although this book is a bit older). Understanding the environment you are going into before you go, such as prevailing winds, constellations which should be visible at that time of year, animal habits etc, is very important to navigate properly. I recommend these books, but think about your environment and what works for you.