Petrol station hitchhiking
Petrol station hitchhiking is especially great in Germany.
Every stop, one drink!
It can be useful to connect to the people who work at the gas station. It makes it less likely that they will send you away.
In Italy you have to be careful. It's illegal to hitchhike on the autostrada, it's a bit unclear if it's illegal on the gas stations on the highway as well.