In the current story I'm writing, my character is stranded on another planet after his ship has crashed. I plan on a large fraction of the story taking place in this setting, and while I'm not entirely settled on how much time will pass in story, I know it will be long enough for food and water resources to become a concern. I'm going to be honest right off the bat and admit this is for a fan fiction, so you can have a better understanding of my guidelines and the established universe I'm working with. The character is human, so I cannot solve the issue with making a biological work around. The planet he crashes on isn't an one that appears in the series. I want it to be mysterious: an obstacle for him at every turn. I've already considered how his lack of immunity to certain viruses might come into play, his interactions with the environment and some of it's inhabitants, but I have no idea how to go about scavenging for food and water. If it took place on earth, I could easily google some safe-to-consume plants or animals while fending for yourself in the wild. Like I mentioned, this character is underprepared but I don't want him to come across as stupid and willing to eat just anything that seems safe enough, if that makes any sense. I need some creative ideas about some solutions or ways to go about this subject. Even some information about surviving without food and water or tips on things I should consider regarding that would be helpful. I've done some research on the subject, but any tidbits you may have could really help make the story feel more grounded and real. As real as it can be for sci-fi, anyway.