Our next meeting, August 28th, we will be discussing Emergency Preparedness. Specifically how it applies to Ham Radio. One aspect is knowing how to build antennas from items you have laying around in your garage, office, or if you are desperate, dumpster diving.
Here is one antenna that you can make if you have the coax. The rest you should be able to find and improvise if needed.
These are just a few. You can make an antenna out of basically anything that conducts. But start with these. These are for 2 meters, so any level of tech, from Tech to Extra can build these.