Survival in almost any setting requires a certain set of skills and the tools you will need to accomplish tasks.
While having access to every type of tool is preferable, the reality is that you will only use a few number of tools for most survival scenarios.
It depends on your environment what those tools are, but the one constant is that you need to have a sturdy, sharp and reliable survival knife.
After that, your environment dictates what you will use most and most effectively.
What you need in Maine, for example, will be somewhat different than what you need in Louisiana and what's needed there will differ from what you need in a desert environment.
To see one guys opinion on five tools, you must have when faced with a survival or bush situation, check out the video on the next page.