As has been suggested earlier, always have a Plan B. I would go further and suggest have a plan C and D. The day you start running out of options is the day you will run into trouble.
A good attribute for a bush pilot is the way they can think on their feet and improvise. Having a good knowledge of your machine is critical when things break down as well as having good hand skills to fix it. If you are not comfortable or have the tools to fix anything listed in Schedule 8, then bush flying is not for you. Spend some time in a hangar and know how to fix tyres, check spark plugs etc.