Answering you question literarily. If I found myself homeless, that would mean I would have screwed up in a major way, however the question is posed as a “what if.” So, I wake up, remembering nothing of my past. I would find out what kind of city I am living in. If it is the city I am currently living in, then I would immediately head towards Focus On The Family. Not because they would help me find work and a home, but because I could befriend many in the church, and utilize the many ditches and stream over flows near the building for shelter. Once I found myself in a place of trust with the “high ups” in the “church” I would then proceed to blackmail them, ether into giving me a good paying job, or just for money. If I received a job, then it would be an easy jump to getting a place to live. If I only received money, it would be a considerable amount, enough I could pay for a years worth of rent at a cheap, crappy place. In that years time, I would get a job at any of the many, many, MANY, “fine” establishments in this town, such as the local pawnshops who value drug dealers over educated people (drugies are cheaper to pay, and think less for themselves.) I can easily pretend to be a drugie.
If I was fortunate enough to maintain everything from my past memory but how and why I wound up on the street, then I would head to the Apple Store, beg and pled, demonstrate my knowledge of their products and get a job based off that. I know plenty of places to get “fancied up,” such as the local “Beauty College” They are always looking for test subjects and learning aids, and what better learning aid then a homeless man with feces in his hair?
The problem with asking a question like this is, most people here have never been homeless, nor ever plan to be. The problem with that? We can only relate what would we do with the experiences we know. I have many friends in this town, all of which would help me out at the drop of a hat, however, if I had to ended up homeless after high school, or possibly even before (but those kids end up getting sold to Russia or Japan, so they do end up getting a type of home, albet one they pay for with sex) I would not have made any of these friends or connections, thus, I would have no way of getting help, or even helping myself.
Another consideration is the fact that most homeless people who are homeless for more then a month, want to be that way. People who really want to pull themselves out of the gutter, will. It’s the same principal the applies in the example of: If you have a hobby and really want something to do with that hobby, you will find a way of getting it. I would easily spend 8,000$ on a camera lens, however my friend would never spend that much money on anything but food and drugs.
If we both wound up homeless, he would probably end up staying that way, and I would have found lodging within a few weeks, unless one of my other friends let me crash at their houses.
So, in summery, to answer you question: I would wake up, walk to my best friends house, take a shower in their house, shave, then got beg at the Apple Store. Failing that, Walmart is always hiring, and they come with benefits.