1. Musuem card
2. Hitchhiking
If you are afraid of coming across with bad people then don't. But believe me, it will make you save a lot of money and it is also great opportunity to meet with interesting people and hear about their interesting stories.
3. Tent
You might think that it is not comfortable but I had my best sleeps in a tent.
4. Couchsurfing
You can both host and stay at other people's houses. But it is not only about staying for free but you also make many new friends.
And if you are lucky they might show you around.
5. Wearing one colour
Wear simple and one colour. So that you can combine them easily and you don't have to have many clothes in your bag.
6. Car
For some places it costs a lot less to travel by your own car.
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