There are a number of hospitality sites on the web where people sign up to offer and recieve free accomodation for a few days. This is easily the best way to travel, this way, you get to know a local, see how they live and do it much cheaper than otherwise. Don’t push this too far however, the deal is a place to sleep, this could be the floor or it could be a comfortable bed and the host is under no obligation to make food for you. Some good sites are: Couch Surfing and Hospitality Club amongst others.
Definitely the less comfortable, more dangerous option, but this is usually free. There are camping sites in most places which offer a secure place for a small charge, but you can also knock on someone’s door and ask if you can camp in their back garden or field, people usually say yes, but if they don’t just try the next place, or throw down your tent in a place where there aren’t much people.
Working for Bed and Board
There are many places all over the world which offer bed and board in exchange for working with them, often these places are farms or volunteering organisations, allowing you to give something back at the same time. This allows to see something different that most tourists wouldn’t be able to. One thing is that your free time might not be abundant, so you may not be able to take many days off to see the tourist sites, though every place will have different requirements. One such organisation is: World-Wide Opportunities on Organic Farms (WWOOF),
Again, the best option for getting to know people and practising the language. People are often concerned about safety issues when hitchiking and you should definitely be careful, but safety is generally not the biggest concern. Go to Hitchwiki for information and help on hitchiking
Not always practical, but within city centres, it can save you a few euro on the tram or bus. Another advantage is that you get to know the city better by walking around it. Long-distance journeys are also possible and allow you to get a feel for the rural areas of a country.
Eating from nature
Again, the ‘hard-core option’, in most countries, there are many areas for forraging where one can get some berries or nuts to eat. Another option is fishing. All that’s needed is a hook, some string and a bit of bait.
Cooking your own
Not exactly free, as you have to buy the food, but generally the much cheaper option as you can buy the raw materials cheaply at markets or in grocery stores, then cook it with your own camping stove or at the hostel you’re at. If you’re in a hotel, you can ask the staff for the use of their kitchen, there’s normally no problem, but better ask before you book the room if you’re depending on it.
Making money on the road
That’s right, playing music on the street. Most instruments are easy enough to learn and you just need to learn a few popular songs and to have a money receptacle then you’re ready to go. Tourist areas and busy streets are the best places to perform.
Similar to busking, though usually takes a bit longer to learn. The best thing to do is ask someone you see on the street to teach you, or you can try learning yourself with some juggling balls and internet how-to videos.
Selling arts and crafts
You’d be surprised how easy a number of arts and crafts are to make, often you just need two pieces of string and patience. These can then be sold for profit.
Braiding hair is another easy task that can often bring in alot of money. A good target market is young tourists who have more money than the locals, so you can earn a large amount relative to how much things cost, thus keeping you in stead for a good while.