You could turn to drink, but risk addiction.
Build a reputation or even friendships with various characters including the other homeless and the police
Build your inventory with food, survival tools, clothing and more. Is it a stray? We have done a ton of research for this project and while our wish is to portray the reality of homelessness, various aspects of sleeping rough have been abstracted for the sake of gameplay. But you can only do so much in one day.