Always be aware of your surroundings. Specifically, also make mental notes of the resources available to you.
Also, don't be afraid to think unconventionally. Use the materials around you in versatile ways. Some people only see a plastic fork as a tool for eating; don't be afraid to see it as a small crowbar or as a flexible lever arm. If you happen to be properly prepared, you can use that lever arm to make a mini catapult. And then you can have some real fun. (Plus, you'll make this guy proud.)